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General Information
Symbol
Dmel\amos
Species
D. melanogaster
Name
absent MD neurons and olfactory sensilla
Annotation Symbol
CG10393
Feature Type
FlyBase ID
FBgn0003270
Gene Model Status
Stock Availability
Gene Snapshot
In progress.Contributions welcome.
Also Known As

Tft, Roi

Key Links
Genomic Location
Cytogenetic map
Sequence location
2L:18,596,136..18,596,921 [-]
Recombination map

2-53

RefSeq locus
NT_033779 REGION:18596136..18596921
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Protein Family (UniProt)
-
Molecular Function (GO)
[Detailed GO annotations]
Experimental Evidence
Predictions / Assertions
-
Summaries
Gene Group (FlyBase)
BASIC HELIX-LOOP-HELIX TRANSCRIPTION FACTORS -
Basic helix-loop-helix (bHLH) transcription factors are sequence-specific DNA-binding proteins that regulate transcription. They are characterized by a 60 amino acid region comprising a basic DNA binding domain followed by a HLH motif formed from two amphipathic α-helices connected by a loop. bHLH transcription factors form homo- and hetero-dimeric complexes, which bind to a E box consensus sequence. (Adapted from PMID:15186484).
Protein Function (UniProtKB)
Transcription factor involved in early neurogenesis; sensillum basiconica formation and maybe sensillum trichodea development. Promotes multiple dendritic (MD) neuron formation. Required for olfactory sensilla; regulated by lozenge (lz).
(UniProt, Q9Y0A7)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
Roi: Rough eye
Eye facets of Roi/+ irregularly rounded, sometimes enlarged; eyes sometimes bulge. Roi/Roi lethal; Roi/S viable. Acts as a partial suppressor of B (E. H. Grell). Viability good. RK2A.
Tft: Tufted
Dominant mutation characterized by an increased number of bristles in the postalar, dorsocentral, and scutellar regions; tufts of bristles formed on mesothorax in both homo- and heterozygotes; bristles shorter in homozygotes. Extra bristles located dorsal to halteres at junction of thorax and abdomen. Posterior part of mesonotum appears wider than normal. Homo- and heterozygous females have a greatly reduced scutellum; scutoscutellar suture almost absent; heterozygous males have a nearly normal scutellum (Arnheim, 1967). Small to moderate amounts of fluid tend to remain between the epithelial layers of the wing. Penetrance of extra-bristle character 100%. Tft not suppressed by Df(1)sc19 = Df(1)1A1;1B4-5 but suppressed by Df(1)260-1 = Df(1)1A1;1B4-6 (Garcia-Bellido, communicated to Campuzano, Carramolino, Cabrera, Ruiz-Gomez, Villares, Boronat, and Modolell, 1985, Cell 40: 327-38). Cell autonomous in mosaics (Arnheim, 1967). Viability and fertility low.
Summary (Interactive Fly)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the GBrowse view of Dmel\amos or the JBrowse view of Dmel\amos 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 5.52

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0081081
786
198
Additional Transcript Data and Comments
Reported size (kB)

0.8 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0080631
22.6
198
5.68
Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Efficient DNA binding requires dimerization with another bHLH protein. Interacts with Daughterless (da).

(UniProt, Q9Y0A7)
Crossreferences
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\amos 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 (6 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
Biological Process (4 terms)
Terms Based on Experimental Evidence (4 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
Cellular Component (0 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
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
organism

Comment: maternally deposited

Additional Descriptive Data

amos transcripts are expressed transiently and dynamically during embryogenesis. They are present in a small cluster of ectodermal cells in each thoracic and abdominal segment during stage 10. In stage 11, expression is restricted to a single cell in each segment which quickly ceases expression of amos, first in the thorax and then in the abdomen. The restriction of amos expression to a single cell involves lateral inhibition and does not occur in N mutants. amos expression is also observed in developing head segments in the antennal, mandibular, and labial segments in regions corresponding to the anlage for the olfactory sense organs and the larval antennomaxillary complex. amos transcripts are also detected in cellular blastoderm embryos in a dorsoventral band in the posterior of the embryo and during oogenesis in nurse cells, centripetally migrating follicle cells, and in the oocyte. Later in development, amos transcripts are detected at 0-4hr APF in the anlage of the tarsal claw. The main site of later expression is in the antennal disc, initiating at puparium formation. Expression occurs in three semicircular bands on the medial side of the developing third segment. These are sites from which olfactory sensillum precursors are selected.

amos transcripts are ubiquitous before cellularization. The first zygotic expression is detected in clusters of cells in the procephalic region followed by expression in the segments of the head, thorax, and abdomen. Expression is observed in one cluster in each thoracic and abdominal hemisegment and in three clusters in the maxillary and labial hemisegments and in the procephalic region. With time, expression becomes limited within each cluster.

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

Amos first appears in the third segment of the antennal disc at 1 hr APF. At 2 hr APF, it appears in three to four semicircular domains in the third antennal segment which broaden to appear into a single 'C-shaped' band of cells by 8 hr and 12 hr APF. Its expression partly overlaps that of ems spatially and temporally.

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\amos 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
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 11 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 11 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of amos
Transgenic constructs containing regulatory region of amos
Deletions and Duplications ( 41 )
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
adult head & olfactory sensory organ | ectopic, with Scer\GAL4sca-109-68
adult thorax & macrochaeta, with Scer\GAL4sca-109-68
adult thorax & olfactory sensory organ | ectopic, with Scer\GAL4sca-109-68
antennal segment 1 & olfactory sensory organ | ectopic, with Scer\GAL4hs.PB
antennal segment 2 & olfactory sensory organ | ectopic, with Scer\GAL4hs.PB
macrochaeta | ectopic & adult head, with Scer\GAL4C-765
macrochaeta | ectopic & antenna
macrochaeta | ectopic & antenna (with Df(2L)M36F-S6)
macrochaeta | ectopic & mesothoracic tergum, with Scer\GAL4C-765
microchaeta & adult thorax, with Scer\GAL4sca-109-68
olfactory neuron & embryonic antennal sense organ
scutellum & chordotonal organ | ectopic, with Scer\GAL4sca-109-68
sensillum basiconicum & antenna
sensillum basiconicum & antenna (with Df(2L)M36F-S6)
sensillum campaniformium | ectopic & wing, with Scer\GAL4C-765
sensory mother cell & antennal disc
sensory mother cell | ectopic & dorsal mesothoracic disc, with Scer\GAL4dpp.blk1
wing vein L3 & chordotonal organ | ectopic, with Scer\GAL4sca-109-68
wing vein L3 & external sensory organ | ectopic, with Scer\GAL4sca-109-68
wing vein L3 & olfactory sensory organ | ectopic, with Scer\GAL4sca-109-68
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (15)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
6 of 15
Yes
Yes
 
5 of 15
No
Yes
2 of 15
No
Yes
2 of 15
No
Yes
2 of 15
No
Yes
1 of 15
No
No
 
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
 
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (15)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
6 of 15
Yes
Yes
 
5 of 15
No
Yes
 
2 of 15
No
Yes
2 of 15
No
Yes
 
2 of 15
No
Yes
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
 
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Rattus norvegicus (Norway rat) (15)
5 of 13
Yes
Yes
4 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
No
1 of 13
No
No
1 of 13
No
No
Xenopus tropicalis (Western clawed frog) (11)
4 of 12
Yes
Yes
3 of 12
No
Yes
2 of 12
No
Yes
2 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
1 of 12
No
No
1 of 12
No
No
Danio rerio (Zebrafish) (18)
5 of 15
Yes
No
5 of 15
Yes
Yes
5 of 15
Yes
Yes
4 of 15
No
No
2 of 15
No
Yes
2 of 15
No
Yes
2 of 15
No
Yes
2 of 15
No
Yes
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
Yes
1 of 15
No
No
Caenorhabditis elegans (Nematode, roundworm) (3)
5 of 15
Yes
No
1 of 15
No
No
1 of 15
No
No
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) ( EOG09190HHS )
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
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( EOG09150DBJ )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Lucilia cuprina
Australian sheep blowfly
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) ( EOG090W0G3L )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Apis florea
Little honeybee
Apis florea
Little honeybee
Apis mellifera
Western honey bee
Apis mellifera
Western honey bee
Bombus impatiens
Common eastern bumble bee
Bombus impatiens
Common eastern bumble bee
Bombus terrestris
Buff-tailed bumblebee
Bombus terrestris
Buff-tailed bumblebee
Linepithema humile
Argentine ant
Linepithema humile
Argentine ant
Megachile rotundata
Alfalfa leafcutting bee
Megachile rotundata
Alfalfa leafcutting bee
Nasonia vitripennis
Parasitic wasp
Dendroctonus ponderosae
Mountain pine beetle
Tribolium castaneum
Red flour beetle
Tribolium castaneum
Red flour beetle
Pediculus humanus
Human body louse
Rhodnius prolixus
Kissing bug
Rhodnius prolixus
Kissing bug
Acyrthosiphon pisum
Pea aphid
Zootermopsis nevadensis
Nevada dampwood termite
Zootermopsis nevadensis
Nevada dampwood termite
Orthologs in non-Insect Arthropods (via OrthoDB v9.1) ( EOG090X0G41 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Strigamia maritima
European centipede
Ixodes scapularis
Black-legged tick
Ixodes scapularis
Black-legged tick
Stegodyphus mimosarum
African social velvet spider
Daphnia pulex
Water flea
Daphnia pulex
Water flea
Orthologs in non-Arthropod Metazoa (via OrthoDB v9.1) ( None identified )
No non-Arthropod Metazoa orthologies identified
Paralogs
Paralogs (via DIOPT v7.1)
Drosophila melanogaster (Fruit fly) (7)
4 of 10
4 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 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 ( 1 )
    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.
    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
    enhanceable
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Efficient DNA binding requires dimerization with another bHLH protein. Interacts with Daughterless (da).
    (UniProt, Q9Y0A7 )
    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

    2-53

    Cytogenetic map
    Sequence location
    2L:18,596,136..18,596,921 [-]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    36F6-36F6
    Limits computationally determined from genome sequence between P{lacW}Aac11k06710 and P{EP}CG10413EP2164
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    36F2-36F6
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Right of (cM)
    Notes

    Left arm of chromosome 2; not separated from In(2L)t.

    Stocks and Reagents
    Stocks (148)
    Genomic Clones (18)
     

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

    cDNA Clones (2)
     

    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)
      BDGP DGC clones
        Other clones
          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 database merge of

          Source for merge of: amos Tft

          Source for merge of: Roi amos

          Additional comments

          The "Roi" rough eye mutant allele is due to an inversion between 36A and 37A (In(2L)Roi1). The proximal breakpoint is 2.6kb downstream of "amos" and is within the last exon of CG15160. The distal breakpoint is within the first intron of CG5888. Several lines of evidence suggest that the "Roi" phenotype is caused by a gain-of-function allele of "amos" rather than being due to an effect of the inversion on another gene; "amos" is expressed in high levels in a broad area surrounding the morphogenetic furrow in "Roi" third instar larvae (in contrast to wild type), overexpression of "amos" in the eye disc can produce a phenotype similar to that of "Roi" and reversion of the phenotype has been achieved by the insertion of a P-element a few kilobases downstream of "amos" which is associated with a severe reduction of "amos" expression in the eye. In addition, although the location of the In(2L)Roi1 breakpoints means that a chimeric gene could potentially be formed from the 5' portion of CG5888 and the 3' portion of CG15160, this chimeric RNA has not been detected in "Roi" mutants and although dac is also within the inverted segment it does not appear to be implicated in the "Roi" phenotype.

          Other Comments

          amos is required for the normal formation of the larval dorsal organ.

          amos is a proneural gene for olfactory sensilla, most likely the sensilla basiconica and trichodea.

          amos promotes multiple dendritic neuron formation.

          Loss of amos function eliminates multiple dendritic neurons in embryos. Misexpression of amos results in ectopic multiple dendritic neurons.

          Origin and Etymology
          Discoverer

          Ritterhouse, 25th June 1952. Ives, 18th Nov. 1947.

          Etymology
          Identification
          External Crossreferences and Linkouts ( 29 )
          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
          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.
          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)
          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
          Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
          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 (14)
          Reported As
          Name Synonyms
          Absent MD neurons
          Rough eye
          Tufted
          absent MD neurons and olfactory sensilla
          absent md neurons and olfactory sensilla
          Secondary FlyBase IDs
          • FBgn0003689
          • FBgn0027104
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          References (134)