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General Information
Symbol
Dmel\noc
Species
D. melanogaster
Name
no ocelli
Annotation Symbol
CG4491
Feature Type
FlyBase ID
FBgn0005771
Gene Model Status
Stock Availability
Gene Snapshot
In progress.Contributions welcome.
Also Known As

l(2)35Ba, l(2)br22, nocA, br22, BG:DS04641.1

Key Links
Genomic Location
Cytogenetic map
Sequence location
2L:14,490,859..14,494,019 [+]
Recombination map

2-50

RefSeq locus
NT_033779 REGION:14490859..14494019
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Protein Family (UniProt)
Belongs to the Elbow/Noc family. (Q24423)
Protein Signatures (InterPro)
Molecular Function (GO)
[Detailed GO annotations]
Summaries
Gene Group (FlyBase)
C2H2 ZINC FINGER TRANSCRIPTION FACTORS -
Zinc finger C2H2 transcription factors are sequence-specific DNA binding proteins that regulate transcription. They possess DNA-binding domains that are formed from repeated Cys2His2 zinc finger motifs. (Adapted from PMID:1835093, FBrf0220103 and FBrf0155739).
Protein Function (UniProtKB)
May negatively regulate Notch-induced cell proliferation in the eye-head primordium. Required for development of the supraesophageal ganglion and ocelli. May act in leg and wing primordia to negatively regulate body-wall specifying genes and thereby promote appendage formation. Plays a role in tracheal development.
(UniProt, Q24423)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
l(2)35Ba
l(2)35Ba1 may escape in combination with deficiency for the locus; escapers are weak elbow in phenotype if deficiency includes el, but not if it does not. All alleles express weak elbow in combination with el1; heteroallelic escapers [i.e., l(2)35Ba4 in combination with other alleles] are weak elbow. Semilethal with In(2LR)Scorv1 and Scorv27; also show weak noc phenotype in combination with strong noc alleles.
noc: no ocelli
The genetic complexity of noc is indicated by phenotypic as well as molecular data (McGill et al., 1988). Mutants are characterized by partial or complete absence of ocelli and their associated bristles. Strong noc alleles lack all three ocelli and have fewer interocellar microchaetae; ocellar and interocellar bristles are absent; anterior postalar and notopleural bristles may not be present; postvertical bristles are crooked, an adventitious pair often occurring between a normal pair. Weak alleles may overlap wild type in phenotype, the flies having smaller ocelli and an aberrant pattern of interocellar microchaetae. Male and female homozygotes are viable and fertile. Penetrance and expressivity is stronger in males and in flies that emerge later. While a homozygous deletion of the entire noc region is lethal, distal or proximal regions can be homozygously deleted without causing lethality. Some noc alleles and deficiences are lethal with In(2L)Scorv1, whose 2L breakpoint lies within noc, while other alleles are viable with the Sco inversion.
Sco: Scutoid
Sco/+ flies exhibit the loss of 10-15 bristles, scutellars, notopleurals, upper humerals and anterior postalars being most frequently affected; removes both trichogen and tormogen cell derivatives. Homozygotes nearly lethal; rare homozygous or hemizygous escapers have only eight or so bristles per fly; eyes small and very rough. Escapers short lived and sterile. RK1A.
Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
1

Please see the GBrowse view of Dmel\noc or the JBrowse view of Dmel\noc 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
Comments on Gene Model

Gene model reviewed during 5.51

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0080643
2859
537
FBtr0342913
2673
537
Additional Transcript Data and Comments
Reported size (kB)

~3 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0080215
54.0
537
9.13
FBpp0309705
54.0
537
9.13
Polypeptides with Identical Sequences

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

537 aa isoforms: noc-PA, noc-PB
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Interacts with elB.

(UniProt, Q24423)
Crossreferences
InterPro - A database of protein families, domains and functional sites
Linkouts
Sequences Consistent with the Gene Model
Mapped Features

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

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Gene Ontology (14 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from physical interaction with FLYBASE:elB; FB:FBgn0004858
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR013087
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN000968869
(assigned by GO_Central )
Biological Process (10 terms)
Terms Based on Experimental Evidence (9 terms)
CV Term
Evidence
References
inferred from mutant phenotype
(assigned by UniProt )
inferred from mutant phenotype
(assigned by UniProt )
inferred from mutant phenotype
(assigned by UniProt )
inferred from mutant phenotype
(assigned by UniProt )
inferred from mutant phenotype
(assigned by UniProt )
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000968869
(assigned by GO_Central )
Cellular Component (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000968869
(assigned by GO_Central )
Expression Data
Expression Summary Ribbons
Colored tiles in ribbon indicate that expression data has been curated by FlyBase for that anatomical location. Colorless tiles indicate that there is no curated data for that location.
For complete stage-specific expression data, view the modENCODE Development RNA-Seq section under High-Throughput Expression below.
Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
antennal anlage

Comment: reported as procephalic ectoderm anlage

central brain anlage

Comment: reported as procephalic ectoderm anlage

dorsal head epidermis anlage

Comment: reported as procephalic ectoderm anlage

visual anlage

Comment: reported as procephalic ectoderm anlage

antennal primordium

Comment: reported as procephalic ectoderm primordium

central brain primordium

Comment: reported as procephalic ectoderm primordium

visual primordium

Comment: reported as procephalic ectoderm primordium

dorsal head epidermis primordium

Comment: reported as procephalic ectoderm primordium

lateral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

ventral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

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

noc is first expressed in the blastoderm embryo in the procephalic ectoderm and in one anterior stripe. After this, seven stripes emerge with expression strongest in stripe 2 and in the ventral region of the stripes. Expression in stripe 8 and stripes 3-7 becomes stronger as development proceeds. Later in germ band extension, as segment polarity pattern emerges with doubled stripes.

noc transcripts are detected in all stages on northern blots with maximal levels occuring in embryonic and pupal stages as well as in adult heads. The two transcripts are present in nearly equal amounts and appear to be coordinately regulated. Transcripts are first detected by in situ hybridization in cellular blastoderm embryos in a rapidly evolving pattern. The initial hybridization at 95-100% egg length retracts to a stripe at 90-95% egg length. This is followed by an additional 2 stripes just posterior to the initial stripe and a stripe near the posterior terminus. 6 more stripes appear along the trunk giving a total of 10. During gastrulation, the 2nd and 3rd anterior-most stripes border the cephalic furrow. Striped expression disappears after gastrulation. By stage 8, expression is seen in the procephalic lobe and along the ventral ectoderm from 50-90% egg length, spanning the cephalic furrow. 12 stripes of expression are seen in the neuroectoderm in stage 9. In stages 10-12, ectodermal expression abd expression around tracheal placodes decreases. Cephlaic expression occurs as two groups of dorsal ectodermal cells in the procephalic lobe as well as the labral segment and stomodeum. After stage 13, no clear pattern is seen and expression is thought to be ubiquitous.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

In second instar eye-antenna discs, elB and noc expression is restricted to the eye primordium. In early third instar discs, expression in the distal part of the antenna primordium is observed. In the eye-head primordium, elB and noc are expressed in the hth domain that indicates the proliferative region. In late third instar larval discs, expression levels remain high in the region anterior to the morphogenetic furrow, at more elevated levels in cells that co-express hth and tsh and at lower levels in the pre-proneural region. Thus elB and noc are expressed at higher levels in the proliferative region of the eye-head primordium.

Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

GBrowse - Visual display of RNA-Seq signals

View Dmel\noc in GBrowse 2
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
FLIGHT - Cell culture data for RNAi and other high-throughput technologies
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
FlyExpress - Embryonic expression images (BDGP data)
  • Stages(s) 4-6
  • Stages(s) 7-8
  • Stages(s) 9-10
  • Stages(s) 11-12
  • Stages(s) 13-16
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 34 )
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 noc
Transgenic constructs containing regulatory region of noc
Deletions and Duplications ( 311 )
Disrupted in
Not disrupted in
Phenotypes
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (2)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
13 of 15
Yes
Yes
 
12 of 15
No
Yes
 
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (2)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
12 of 15
Yes
Yes
10 of 15
No
Yes
Rattus norvegicus (Norway rat) (2)
11 of 13
Yes
Yes
10 of 13
No
Yes
Xenopus tropicalis (Western clawed frog) (2)
12 of 12
Yes
Yes
12 of 12
Yes
Yes
Danio rerio (Zebrafish) (3)
13 of 15
Yes
Yes
11 of 15
No
Yes
5 of 15
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (1)
5 of 15
Yes
Yes
Arabidopsis thaliana (thale-cress) (0)
No records found.
Saccharomyces cerevisiae (Brewer's yeast) (0)
No records found.
Schizosaccharomyces pombe (Fission yeast) (0)
No records found.
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG09190A5V )
Organism
Common Name
Gene
AAA Syntenic Ortholog
Multiple Dmel Genes in this Orthologous Group
Drosophila suzukii
Spotted wing Drosophila
Drosophila simulans
Drosophila sechellia
Drosophila erecta
Drosophila yakuba
Drosophila ananassae
Drosophila pseudoobscura pseudoobscura
Drosophila persimilis
Drosophila willistoni
Drosophila virilis
Drosophila mojavensis
Drosophila grimshawi
Drosophila grimshawi
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( EOG091509OR )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Lucilia cuprina
Australian sheep blowfly
Mayetiola destructor
Hessian fly
Aedes aegypti
Yellow fever mosquito
Aedes aegypti
Yellow fever mosquito
Anopheles darlingi
American malaria mosquito
Anopheles gambiae
Malaria mosquito
Culex quinquefasciatus
Southern house mosquito
Orthologs in non-Dipteran Insects (via OrthoDB v9.1) ( EOG090W0AS2 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Bombyx mori
Silkmoth
Danaus plexippus
Monarch butterfly
Heliconius melpomene
Postman butterfly
Apis florea
Little honeybee
Apis mellifera
Western honey bee
Bombus impatiens
Common eastern bumble bee
Bombus terrestris
Buff-tailed bumblebee
Linepithema humile
Argentine ant
Megachile rotundata
Alfalfa leafcutting bee
Nasonia vitripennis
Parasitic wasp
Dendroctonus ponderosae
Mountain pine beetle
Tribolium castaneum
Red flour beetle
Pediculus humanus
Human body louse
Rhodnius prolixus
Kissing bug
Cimex lectularius
Bed bug
Acyrthosiphon pisum
Pea aphid
Zootermopsis nevadensis
Nevada dampwood termite
Orthologs in non-Insect Arthropods (via OrthoDB v9.1) ( EOG090X0AP6 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Strigamia maritima
European centipede
Ixodes scapularis
Black-legged tick
Stegodyphus mimosarum
African social velvet spider
Stegodyphus mimosarum
African social velvet spider
Tetranychus urticae
Two-spotted spider mite
Daphnia pulex
Water flea
Daphnia pulex
Water flea
Orthologs in non-Arthropod Metazoa (via OrthoDB v9.1) ( EOG091G0GV9 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Strongylocentrotus purpuratus
Purple sea urchin
Ciona intestinalis
Vase tunicate
Paralogs
Paralogs (via DIOPT v7.1)
Drosophila melanogaster (Fruit fly) (1)
5 of 10
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Model Summary Ribbon
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v7.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Homo sapiens (Human)
    Gene name
    Score
    OMIM
    OMIM Phenotype
    DO term
    Complementation?
    Transgene?
    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
    esyN Network Diagram
    Show neighbor-neighbor interactions:
    Select Layout:
    Legend:
    Protein
    RNA
    Selected Interactor(s)
    Interactions Browser

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    esyN Network Diagram
    esyN Network Key:
    Suppression
    Enhancement

    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 elB.
    (UniProt, Q24423 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    MIST (genetic) - An integrated Molecular Interaction Database
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    External Data
    Linkouts
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2L
    Recombination map

    2-50

    Cytogenetic map
    Sequence location
    2L:14,490,859..14,494,019 [+]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    35B2-35B2
    Limits computationally determined from genome sequence between P{EP}elBEP2039&P{PZ}osprJ571 and P{lacW}Su(H)k07904
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    35A4-35A4
    (determined by in situ hybridisation)
    35B1-35B2
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (17)
    Genomic Clones (24)
    cDNA Clones (150)
     

    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 GBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequences
    BDGP DGC clones
    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)
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Other Information
      Relationship to Other Genes
      Source for database identify of

      Source for identity of: noc CG4491

      Source for database merge of
      Additional comments

      The "Sco" (Scutoid) mutant allele was previously listed as an allele of noc in FlyBase, as genetic analysis showed that a high dose of the wild-type noc gene suppresses the expressivity of the Sco phenotype, suggesting that Sco was an antimorphic allele of noc (FBrf0038047). However, FBrf0111871 shows that Sco is in fact an antimorphic allele of sna, and the mutant phenotype is caused by ectopic expression of sna in the eye-antennal and wing imaginal discs.  The Sco allele is therefore now listed as an allele of sna in FlyBase.  FBrf0111871 suggests that the reason that noc in trans affects the expressivity of Sco may be due to transvection effects, as they show that mutations in z, a mediator of transvection, also affect the Sco mutant phenotype.

      Other Comments

      The noc and elB paralogs interact with hth to correctly specify the photoreceptors which detect polarised light at the dorsal rim of the retina, being involved in specifying both morphological and molecular fate. noc and elB also antagonise the transcriptional activator and repressor functions of oc in the retina through distinct protein domains.

      Loss of elB and noc activities induce extensive outgrowths, in a N-dependent way. These overgrowths are not linked to ectopic production of os.

      noc appears, with elB, to regulate the growth of the highly proliferative tissue of the eye-head primordium.

      Origin and Etymology
      Discoverer

      Ashburner.

      Etymology
      Identification
      External Crossreferences and Linkouts ( 43 )
      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 Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
      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/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
      BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
      Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
      Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
      Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
      Flygut - An atlas of the Drosophila adult midgut
      GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
      iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
      InterPro - A database of protein families, domains and functional sites
      KEGG Genes - Molecular building blocks of life in the genomic space.
      modMine - A data warehouse for the modENCODE project
      Linkouts
      BioGRID - A database of protein and genetic interactions.
      DroID - A comprehensive database of gene and protein interactions.
      DRSC - Results frm RNAi screens
      FLIGHT - Cell culture data for RNAi and other high-throughput technologies
      FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
      FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
      FlyMine - An integrated database for Drosophila genomics
      InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
      MIST (genetic) - An integrated Molecular Interaction Database
      MIST (protein-protein) - An integrated Molecular Interaction Database
      Synonyms and Secondary IDs (15)
      Reported As
      Symbol Synonym
      l(2)35Ba/nocA
      Secondary FlyBase IDs
      • FBgn0001971
      • FBgn0002947
      Datasets (0)
      Study focus (0)
      Experimental Role
      Project
      Project Type
      Title
      References (141)