FB2024_04 , released June 25, 2024
Gene: Dmel\nonC
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General Information
Symbol
Dmel\nonC
Species
D. melanogaster
Name
no-on-and-no-off transient C
Annotation Symbol
CG32743
Feature Type
FlyBase ID
FBgn0263968
Gene Model Status
Stock Availability
Enzyme Name (EC)
non-specific serine/threonine protein kinase (2.7.11.1)
Gene Summary
no-on-and-no-off transient C (nonC) encodes a phosphatidylinositol 3-kinase-related kinase. It functions in the nonsense-mediated mRNA decay (NMD) pathway by phosphorylation of the core NMD regulator encoded by Upf1. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

Smg1, rst(1a)cyr, Smg

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
1-18
RefSeq locus
NC_004354 REGION:6824496..6838122
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (16 terms)
Molecular Function (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR031559, InterPro:IPR039414
inferred from biological aspect of ancestor with PANTHER:PTN000124197
inferred from sequence or structural similarity with UniProtKB:Q96Q15
Biological Process (11 terms)
Terms Based on Experimental Evidence (6 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
inferred from direct assay
inferred from mutant phenotype
Terms Based on Predictions or Assertions (6 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity with UniProtKB:Q96Q15
inferred from biological aspect of ancestor with PANTHER:PTN000124327
inferred from sequence or structural similarity with UniProtKB:Q96Q15
inferred from sequence or structural similarity with UniProtKB:Q96Q15
involved_in TOR signaling
inferred from biological aspect of ancestor with PANTHER:PTN000124327
Cellular Component (4 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
is_active_in cytoplasm
inferred from biological aspect of ancestor with PANTHER:PTN000124327
located_in cytoplasm
inferred from sequence or structural similarity with UniProtKB:Q96Q15
is_active_in nucleus
inferred from biological aspect of ancestor with PANTHER:PTN000124197
located_in nucleus
inferred from sequence or structural similarity with UniProtKB:Q96Q15
inferred from biological aspect of ancestor with PANTHER:PTN000124327
inferred from biological aspect of ancestor with PANTHER:PTN000124327
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the PI3/PI4-kinase family. (Q70PP2)
Catalytic Activity (EC/Rhea)
protein serine/threonine kinase activity
(1) ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] (2.7.11.1)
(2) ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl- [protein] (2.7.11.1)
Summaries
Gene Snapshot
no-on-and-no-off transient C (nonC) encodes a phosphatidylinositol 3-kinase-related kinase. It functions in the nonsense-mediated mRNA decay (NMD) pathway by phosphorylation of the core NMD regulator encoded by Upf1. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
ATYPICAL PROTEIN KINASES -
Atypical kinases are protein kinases or putative protein kinases that do not share clear sequence similarity with conventional eukaryotic protein kinases, but they or their orthologs have been shown experimentally to have protein kinase activity. Atypical kinases are defined in FBrf0201870.
Protein Function (UniProtKB)
Serine/threonine protein kinase involved in mRNA surveillance. Recognizes the substrate consensus sequence
(UniProt, Q70PP2)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
nonC (J.C. Hall)
Defective phototaxis and optomotor responses; no light-on or light-off transients in electroretinogram, probably due to defect in photoreceptor cells per se; abnormal orientation to spots in Y-maze test.
Summary (Interactive Fly)

a regulatory kinase of the nonsense-mediated decay pwathway - acts to regulate proper mRNA translation to safeguard synapse morphology and maintain the efficacy of synaptic function

Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\nonC 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 Q70PP2)

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

Gene model reviewed during 5.39

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)
FBtr0070972
10039
3218
FBtr0343321
10621
3218
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0070933
361.6
3218
6.85
FBpp0309979
361.6
3218
6.85
Polypeptides with Identical Sequences

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

3218 aa isoforms: nonC-PA, nonC-PB
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Component of a post-splicing multiprotein NMD complex.

(UniProt, Q70PP2)
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\nonC 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).

2.13

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

JBrowse - Visual display of RNA-Seq signals

View Dmel\nonC 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
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
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
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 ( 24 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 12 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of nonC
Transgenic constructs containing regulatory region of nonC
Aberrations (Deficiencies and Duplications) ( 4 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (18)
12 of 14
Yes
Yes
3 of 14
No
No
1  
2 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1  
1 of 14
No
Yes
1 of 14
No
No
2  
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 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (11)
3 of 14
Yes
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) (15)
12 of 14
Yes
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
Yes
1 of 14
No
Yes
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (7)
9 of 13
Yes
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
Yes
1 of 13
No
No
Danio rerio (Zebrafish) (15)
11 of 14
Yes
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
Caenorhabditis elegans (Nematode, roundworm) (6)
9 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
Anopheles gambiae (African malaria mosquito) (10)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (9)
3 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
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Saccharomyces cerevisiae (Brewer's yeast) (7)
2 of 13
Yes
No
2 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
No
Schizosaccharomyces pombe (Fission yeast) (8)
2 of 12
Yes
No
2 of 12
Yes
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
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:nonC. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (10)
4 of 13
3 of 13
2 of 13
2 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
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 ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    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
    esyN Network Diagram
    Show neighbor-neighbor interactions:
    Show/hide secondary interactors 
    (data from AllianceMine provided by esyN)
    Select Layout:
    Legend:
    Protein
    RNA
    Selected Interactor(s)
    Other Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    esyN Network Diagram
    Other Interaction Browsers
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Component of a post-splicing multiprotein NMD complex.
    (UniProt, Q70PP2 )
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    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.
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-18
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    6D3-6D4
    Limits computationally determined from genome sequence between P{EP}C3GEP1613 and P{EP}EP1388EP1388&P{EP}EP1573
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Mapped using (unspecified) deficiency and duplication chromosomes.
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes

    1-17.5 map position obtained using Smg1rst1. 1-18.2 map position obtained using Smg1rst2.

    Stocks and Reagents
    Stocks (15)
    Genomic Clones (13)
     

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

    cDNA Clones (12)
     

    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
    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
      RNAi and Array Information
      Linkouts
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Loss of nonC function impairs basal synaptic efficacy and reduces the fidelity of neurotransmission.

          nonC facilitates gross neuromuscular junction synaptic morphological development, but does not appear to be required for maintenance of pre- and postsynaptic molecular specializations in individual boutons.

          nonC is involved in regulation of the trafficking underlying synaptic vesicle pools.

          nonC mutants exhibit impaired presynaptic function at the level of whole animal and single synaptic boutons.

          Loss of nonC prevents the synaptic vesicle cycle from maintaining the rate required during periods of demand for high-frequency transmission.

          Two nonsense alleles of Smg1 do not affect nonsense-mediated decay in D.melanogaster.

          dsRNA made from templates generated with primers directed against Smg1 that is transfected into S2 treated with Listeria monocytogenes reveals Smg1 to be involved in Listeria monocytogenes entry.

          dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.

          Mutants show resistance to cyromazine growth regulator.

          Defective phototaxis and optomotor responses; no light-on or light-off transients in electroretinogram, probably due to defect in photoreceptor cells per se; abnormal orientation to spots in Y-maze test.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Smg1 anon-WO0170980.133

          Source for merge of: Smg1 anon- EST:Liang-1.24

          Source for merge of: Smg1 rst(1a)cyr

          Source for merge of: CG4549 CG4555

          Source for merge of: nonC Smg1

          Additional comments

          Annotations CG4549 and CG4555 merged as CG32743 in release 3 of the genome annotation.

          Source for merge of Smg1 anon-WO0170980.133 was sequence comparison ( date:051113 ).

          Source for merge of CG4549 CG4555 was a shared cDNA ( date:010720 ).

          Nomenclature History
          Source for database identify of
          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (17)
          Reported As
          Name Synonyms
          FRAP-related
          Smg1
          no on or off transient C
          no-on-and-no-off transient C
          resistance 1a cyromazine
          Secondary FlyBase IDs
          • FBgn0002959
          • FBgn0052743
          • FBgn0024193
          • FBgn0026002
          • FBgn0029908
          • FBgn0029910
          • FBgn0046599
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          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/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.
          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.
          Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
          FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
          FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
          Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
          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.
          SignaLink - A signaling pathway resource with multi-layered regulatory networks.
          References (87)