FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\sqd
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General Information
Symbol
Dmel\sqd
Species
D. melanogaster
Name
squid
Annotation Symbol
CG16901
Feature Type
FlyBase ID
FBgn0263396
Gene Model Status
Stock Availability
Gene Summary
squid (sqd) encodes a member of the hnRNPA family of RNA binding proteins. It is involved in the localization and translational regulation of grk mRNA in oogenesis. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

hrp40, l(3)j4B4, l(3)EP3631, hnRNP A, RRM3

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-54
RefSeq locus
NT_033777 REGION:13634862..13646304
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (30 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR035979
enables RNA binding
inferred from biological aspect of ancestor with PANTHER:PTN002689978
inferred from electronic annotation with InterPro:IPR000504
Biological Process (19 terms)
Terms Based on Experimental Evidence (12 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in oogenesis
inferred from mutant phenotype
inferred from mutant phenotype
inferred from expression pattern
inferred from high throughput mutant phenotype
Terms Based on Predictions or Assertions (9 terms)
CV Term
Evidence
References
Cellular Component (8 terms)
Terms Based on Experimental Evidence (6 terms)
CV Term
Evidence
References
inferred from high throughput direct assay
located_in chromatin
inferred from direct assay
located_in nucleus
inferred from direct assay
inferred from high throughput direct assay
located_in omega speckle
inferred from direct assay
inferred from high throughput direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
is_active_in chromatin
inferred from biological aspect of ancestor with PANTHER:PTN002689978
located_in cytoplasm
traceable author statement
is_active_in nucleoplasm
inferred from biological aspect of ancestor with PANTHER:PTN002689978
located_in nucleus
inferred by curator from GO:0000381
Gene Group (FlyBase)
Protein Family (UniProt)
-
Summaries
Gene Snapshot
squid (sqd) encodes a member of the hnRNPA family of RNA binding proteins. It is involved in the localization and translational regulation of grk mRNA in oogenesis. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
SPLICEOSOME COMPLEX A -
Nuclear pre-mRNA splicing is catalyzed by the spliceosome which assembles in a step-wise manner. Complex A, the pre-spliceosome, is composed of U1 and U2 snRNPs and proteins involved in recognition of the 5' splice site and branch point. (Adapted from PMID:24452469 and PMID:23118483).
Protein Function (UniProtKB)
Component of ribonucleosomes (PubMed:7684991). Could be needed to organize a concentration gradient of a dorsalizing morphogen (Dm) originating in the germinal vesicle (PubMed:7684991). At least one of the isoforms is essential in somatic tissues (PubMed:7684991). Interacts with grk mRNA (via 3' UTR) and involved in its localization to the dorsal anterior region of the oocyte during dorsal-ventral axis determination; may function as a ribonuclear protein complex together with otu and Hrb27C (PubMed:10197986, PubMed:15056611). Required for polytene chromosome dispersal in nurse cells during oogenesis; nuclear isoforms play a greater role in this than cytoplasmic isoforms (PubMed:15056611).
(UniProt, Q08473)
Summary (Interactive Fly)

RNA-binding protein, hnRNP D homolog - Gurken mRNA localization and translation are coupled by an interaction between Sqd and the translational repressor protein Bruno - Squid promotes apical cytoplasmic transport and localization of Fushi tarazu transcripts

Gene Model and Products
Number of Transcripts
5
Number of Unique Polypeptides
4

Please see the JBrowse view of Dmel\sqd for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry Q08473)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
Comments on Gene Model

Low-frequency RNA-Seq exon junction(s) not annotated.

Annotated transcripts do not represent all possible combinations of alternative exons and/or alternative promoters.

Gene model reviewed during 5.47

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0082854
5551
321
FBtr0082855
2115
344
FBtr0082856
2239
308
FBtr0082857
1983
178
FBtr0309094
2844
308
Additional Transcript Data and Comments
Reported size (kB)

4.8, 3.5, 2.3, 1.9, 1.7, 1.5 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0082319
35.0
321
6.54
FBpp0082320
36.2
344
7.62
FBpp0082321
33.1
308
6.96
FBpp0089309
18.3
178
9.97
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

308 aa isoforms: sqd-PC, sqd-PE
Additional Polypeptide Data and Comments
Reported size (kDa)

321, 308 (aa)

40 (kD observed)

345, 321 (aa); 40 (kD observed); 36, 35 (kD predicted)

Comments
External Data
Subunit Structure (UniProtKB)

Interacts with bru1/Bruno; the interaction is direct but weak, and may play a role in regulation of grk mRNA localization and translation.

(UniProt, Q08473)
Domain

Possesses 2 putative nuclear-localization domains, a M9 motif found only in isoform B (sqdS) and a M9-like motif found in all isoforms described (Probable). These may mediate interaction with Tnpo/Transportin and Transportin-dependent nuclear localization (PubMed:10197986).

(UniProt, Q08473)
Crossreferences
Linkouts
Sequences Consistent with the Gene Model
Nucleotide / Polypeptide Records
 
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\sqd using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

-1.18

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Isoform-specific expression patterns are observed. Sex-specific expression of alternative transcripts observed.

1.5kb sqd transcripts are expressed predominantly in ovaries.

2.3kb sqd transcripts are expressed predominantly in non-ovarian tissues.

1.9kb sqd transcripts are expressed predominantly in ovaries.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
western blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
inferred from high throughput direct assay
located_in chromatin
inferred from direct assay
located_in nucleus
inferred from direct assay
inferred from high throughput direct assay
located_in omega speckle
inferred from direct assay
inferred from high throughput direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\sqd in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 35 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 16 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of sqd
Transgenic constructs containing regulatory region of sqd
Aberrations (Deficiencies and Duplications) ( 7 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
microtubule organizing center & oocyte | germ-line clone
nurse cell & nuclear chromosome
oocyte & microtubule | germ-line clone
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (96)
11 of 14
Yes
Yes
9 of 14
No
Yes
9 of 14
No
Yes
4  
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
1  
2 of 14
No
Yes
1 of 14
No
No
2  
1 of 14
No
No
3  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
3  
1 of 14
No
No
2  
1 of 14
No
No
3  
1 of 14
No
No
2  
1 of 14
No
No
83  
1 of 14
No
No
1 of 14
No
No
5  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
13  
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
8  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
3  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
20  
1 of 14
No
No
0  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
144  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
2  
1 of 14
No
No
1  
1 of 14
No
No
4  
1 of 14
No
Yes
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (56)
11 of 14
Yes
Yes
10 of 14
No
Yes
10 of 14
No
Yes
5 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
Mus musculus (laboratory mouse) (62)
10 of 14
Yes
Yes
10 of 14
Yes
Yes
10 of 14
Yes
Yes
5 of 14
No
Yes
5 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
0  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (45)
8 of 13
Yes
Yes
8 of 13
Yes
Yes
8 of 13
Yes
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (68)
10 of 14
Yes
Yes
10 of 14
Yes
Yes
9 of 14
No
Yes
9 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (44)
7 of 14
Yes
Yes
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (56)
11 of 12
Yes
Yes
1 of 12
No
No
Arabidopsis thaliana (thale-cress) (134)
3 of 13
Yes
No
3 of 13
Yes
No
3 of 13
Yes
No
3 of 13
Yes
No
3 of 13
Yes
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
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Yes
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Yes
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No
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No
No
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No
No
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No
No
Saccharomyces cerevisiae (Brewer's yeast) (15)
4 of 13
Yes
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
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Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (11)
3 of 12
Yes
No
2 of 12
No
Yes
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
Yes
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:sqd. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (57)
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Human Disease Associations
FlyBase Human Disease Model Reports
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 0 )
Allele
Disease
Evidence
References
Potential Models Based on Orthology ( 1 )
Modifiers Based on Experimental Evidence ( 1 )
Allele
Disease
Interaction
References
Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
Functional Complementation Data
Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
Interactions
Summary of Physical Interactions
Interaction Browsers

Please see the Physical Interaction reports below for full details
RNA-protein
Physical Interaction
Assay
References
protein-protein
Physical Interaction
Assay
References
Summary of Genetic Interactions
Interaction Browsers

Please look at the allele data for full details of the genetic interactions
Starting gene(s)
Interaction type
Interacting gene(s)
Reference
Starting gene(s)
Interaction type
Interacting gene(s)
Reference
External Data
Subunit Structure (UniProtKB)
Interacts with bru1/Bruno; the interaction is direct but weak, and may play a role in regulation of grk mRNA localization and translation.
(UniProt, Q08473 )
Linkouts
DroID - A comprehensive database of gene and protein interactions.
MIST (protein-protein) - An integrated Molecular Interaction Database
Pathways
Signaling Pathways (FlyBase)
Metabolic Pathways
FlyBase
External Links
External Data
Linkouts
KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
Class of Gene
Genomic Location and Detailed Mapping Data
Chromosome (arm)
3R
Recombination map
3-54
Cytogenetic map
Sequence location
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
87F5-87F6
Limits computationally determined from genome sequence between P{PZ}CtBP03463 and P{lacW}B52s2249&P{lacW}flflL4179
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
87F2-87F3
(determined by in situ hybridisation) 87F3--4 (determined by in situ hybridisation)
87F3-87F4
(determined by in situ hybridisation) 87F2--3 (determined by in situ hybridisation)
87F-87F
(determined by in situ hybridisation)
87F4-87F10
(determined by in situ hybridisation)
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Stocks and Reagents
Stocks (18)
Genomic Clones (18)
 

Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete

cDNA Clones (819)
 

Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.

cDNA clones, fully sequenced
Other clones
Drosophila Genomics Resource Center cDNA clones

For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

cDNA Clones, End Sequenced (ESTs)
Other clones
RNAi and Array Information
Linkouts
Antibody Information
Laboratory Generated Antibodies
Commercially Available Antibodies
 
Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
Cell Line Information
Publicly Available Cell Lines
 
    Other Stable Cell Lines
     
      Other Comments

      Nonsense-mediated mRNA decay (NMD) down-regulates a distinct splice isoform(s) of this gene.

      Identified as a potential component of the hh signalling pathway in a genome-wide RNAi screen. dsRNA made from templates generated with primers directed affects the extent of expression of a hh signaling reporter construct in Clone 8 cells.

      New annotation (CR33328) in release 3.2 of the genome annotation.

      ftz transcript localization in blastoderm embryos involves sqd, which selectively binds to the ftz 3' UTR.

      Sxl does not form an immunoprecipitable complex with sqd.

      The autosomal "FLP-DFS" technique (using the P{ovoD1-18} P{FRT(whs)} P{hsFLP} chromosomes) has been used to identify the specific maternal effect phenotype for the zygotic lethal mutation. sqd is required for germ cell viability or early oogenesis.

      sqd expression patterns in wild type and mutant ovaries demonstrates an essential role of sqd gene product in the germ line during oogenesis.

      Phenotypic and molecular characterisation of sqd demonstrates that the RNA-binding gene product plays a central role in establishing egg polarity.

      A sequence comparison and numerical analysis of the RRM-containing (RNA recognition motif) proteins suggests that functionally related RRM-containing proteins have significant sequence similarities in their RRMs.

      The distribution of the hnRNP protein sqd on nascent transcripts from polytene chromosomes has been studied.

      A sqd cDNA clone has been isolated and sequenced.

      Relationship to Other Genes
      Source for database merge of

      Source for merge of: CR33328 BcDNA:GM03761

      Source for merge of: sqd l(3)j4B4

      Source for merge of: sqd Rbp3

      Source for merge of: CG16901 CG17791

      Source for merge of: sqd CR33328

      Additional comments

      Annotation CG16901 merged with annotation CR33328 in release 5.40 of the genome annotation; CR33328 corresponds to 3' UTR of CG16901.

      Annotations CG16901 and CG17791 merged as sqd in release 3 of the genome annotation.

      Nomenclature History
      Source for database identify of

      Source for identity of: sqd CG17791

      Nomenclature comments
      Etymology
      Synonyms and Secondary IDs (27)
      Reported As
      Symbol Synonym
      BcDNA:GM03761
      CR33328
      Hrb87Fb
      Rbp3
      fs(3)00048
      l(3)j6E3
      l(3)j8E7
      Secondary FlyBase IDs
      • FBgn0053328
      • FBgn0047283
      • FBgn0086897
      • FBgn0003498
      • FBgn0010257
      • FBgn0010299
      • FBgn0011398
      • FBgn0011413
      • FBgn0027643
      • FBgn0040556
      • FBgn0011363
      Datasets (0)
      Study focus (0)
      Experimental Role
      Project
      Project Type
      Title
      Study result (0)
      Result
      Result Type
      Title
      External Crossreferences and Linkouts ( 96 )
      Sequence Crossreferences
      NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
      GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
      RefSeq - A comprehensive, integrated, non-redundant, well-annotated set of reference sequences including genomic, transcript, and protein.
      UniProt/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
      UniProt/Swiss-Prot - Manually annotated and reviewed records of protein sequence and functional information
      UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
      Other crossreferences
      AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
      BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
      DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
      EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
      FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
      KEGG Genes - Molecular building blocks of life in the genomic space.
      MARRVEL_MODEL - MARRVEL (model organism gene)
      Linkouts
      Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
      DroID - A comprehensive database of gene and protein interactions.
      Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
      Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
      FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
      Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
      FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
      iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
      Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
      KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
      MIST (protein-protein) - An integrated Molecular Interaction Database
      Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
      References (280)