FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\Nf1
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General Information
Symbol
Dmel\Nf1
Species
D. melanogaster
Name
Neurofibromin 1
Annotation Symbol
CG8318
Feature Type
FlyBase ID
FBgn0015269
Gene Model Status
Stock Availability
Gene Summary
Neurofibromin 1 (Nf1) encodes a protein that functions as a GTPase activating protein for the products of Ras85D and Ras64B in the larval and adult nervous system. Loss of Nf1 results in excess Ras-Raf-ERK signaling and to a non-cell-autonomous cAMP/PKA signaling defect. The product of Nf1 contributes to postembryonic growth, learning/memory, and circadian rhythm. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

dNf1, Neurofibromatosis-1, neurofibromin, neurofibromatosis type 1, NF-1

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-89
RefSeq locus
NT_033777 REGION:25983013..25995737
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (18 terms)
Molecular Function (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN008939999
Biological Process (17 terms)
Terms Based on Experimental Evidence (16 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
involved_in locomotor rhythm
inferred from mutant phenotype
involved_in long-term memory
inferred from mutant phenotype
involved_in olfactory learning
inferred from mutant phenotype
inferred from genetic interaction with FLYBASE:poe; FB:FBgn0011230
inferred from genetic interaction with FLYBASE:ine; FB:FBgn0011603
inferred from genetic interaction with FLYBASE:Sos; FB:FBgn0001965
inferred from genetic interaction with FLYBASE:Ras85D; FB:FBgn0003205
inferred from mutant phenotype
inferred from genetic interaction with FLYBASE:Pdfr; FB:FBgn0260753
inferred from mutant phenotype
inferred from mutant phenotype
involved_in response to heat
inferred from mutant phenotype
inferred from mutant phenotype
involved_in short-term memory
inferred from mutant phenotype
involved_in sleep
inferred from genetic interaction with UniProtKB:Q9V410
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
Cellular Component (0 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
Protein Family (UniProt)
-
Summaries
Gene Snapshot
Neurofibromin 1 (Nf1) encodes a protein that functions as a GTPase activating protein for the products of Ras85D and Ras64B in the larval and adult nervous system. Loss of Nf1 results in excess Ras-Raf-ERK signaling and to a non-cell-autonomous cAMP/PKA signaling defect. The product of Nf1 contributes to postembryonic growth, learning/memory, and circadian rhythm. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
RAS-LIKE GTPASE ACTIVATING PROTEINS -
Ras-like GTPase activating proteins are an evolutionary-related group of Ras GAPs that promote GTP hydrolysis by the Ras subfamily of the Ras GTPases. (Adapted from FBrf0229300).
Summary (Interactive Fly)

GAP-related domain protein functioning in the PKA pathway - critical to the biochemical processes underlying olfactory learning

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

Please see the JBrowse view of Dmel\Nf1 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 Q9VBJ2)

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

Stop-codon suppression (UGA) postulated; FBrf0216884.

Gene model reviewed during 5.44

Gene model reviewed during 5.47

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0084952
8893
2802
FBtr0084953
8892
2746
FBtr0100113
9737
2764
FBtr0330182
9737
2793
FBtr0330183
9647
2734
Additional Transcript Data and Comments
Reported size (kB)

9.750, 8.843 (compiled cDNA)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0084326
317.2
2802
6.86
FBpp0084327
311.1
2746
6.74
FBpp0100151
313.0
2764
6.80
FBpp0303215
316.3
2793
6.96
FBpp0303216
309.6
2734
6.76
Polypeptides with Identical Sequences

None of the polypeptides share 100% sequence identity.

Additional Polypeptide Data and Comments
Reported size (kDa)

2802, 2764 (aa); 280 (kD observed)

Comments
External Data
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\Nf1 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).

-0.71

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Nf1 is expressed in most, if not all, cell body regions of the adult central brain. Expression is apparent in cell body regions surrounding the antennal lobes, protocerebrum, lateral horn and the mushroom body calyces.

Nf1 transcripts are widely expressed in low amounts.

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
Additional Descriptive Data

Nf1 protein is expressed throughout the third instar larval and adult brain. In the adult, labelling is stronger in the mushroom body calyx and cortex (dendrites and cell bodies of Kenyon cells, respectively), protocerebral bridge, subesophageal ganglion and median bundle. Expression of Nf1 protein in the protocerebral bridge and mushroom body calyx colocalises with that of Alk protein.

Nf1 protein is expressed in all post-mitotic neurons in the larval central nervous system, at all larval stages.

Nf1 protein is widely expressed in low amounts.

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\Nf1 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
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 13 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 34 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Nf1
Transgenic constructs containing regulatory region of Nf1
Aberrations (Deficiencies and Duplications) ( 2 )
Inferred from experimentation ( 2 )
Inferred from location ( 5 )
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
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (12)
14 of 14
Yes
Yes
10  
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 of 14
No
No
1 of 14
No
No
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)
14 of 14
Yes
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
Mus musculus (laboratory mouse) (11)
13 of 14
Yes
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
Xenopus tropicalis (Western clawed frog) (10)
11 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
Danio rerio (Zebrafish) (16)
14 of 14
Yes
Yes
12 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
Caenorhabditis elegans (Nematode, roundworm) (2)
1 of 14
Yes
No
1 of 14
Yes
No
Anopheles gambiae (African malaria mosquito) (4)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (1)
1 of 13
Yes
No
Saccharomyces cerevisiae (Brewer's yeast) (3)
8 of 13
Yes
Yes
8 of 13
Yes
Yes
2 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (2)
2 of 12
Yes
Yes
1 of 12
No
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Nf1. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (3)
3 of 13
3 of 13
3 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 11 )
Allele
Disease
Evidence
References
Potential Models Based on Orthology ( 5 )
Modifiers Based on Experimental Evidence ( 4 )
Allele
Disease
Interaction
References
is ameliorated by Raf12
is ameliorated by rl1
is ameliorated by jebweli
is ameliorated by car1
is ameliorated by elav1
is ameliorated by cnkXE-385
is ameliorated by amxf06362
is ameliorated by carΔ146
is exacerbated by Cul3gft2
is ameliorated by jebKK111857
is ameliorated by Dap160Δ1
is ameliorated by Dap160Δ2
is exacerbated by Pka-C1B3
is ameliorated by cnkE-2083
is NOT ameliorated by RetK805A.UAS
is ameliorated by Pde4ML
is ameliorated by dor8
is ameliorated by Dsor1LH110
is ameliorated by elavG0031
is ameliorated by amxGD1168
is exacerbated by Pka-C106353
is ameliorated by Pde4dnc-1
is ameliorated by Pde4dnc-M14
is ameliorated by AlkKK102942
is ameliorated by cnkKK109209
is ameliorated by Dsor1GD9123
is ameliorated by Alk1
is ameliorated by AlkGD42
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
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
Linkouts
BioGRID - A database of protein and genetic interactions.
DroID - A comprehensive database of gene and protein interactions.
MIST (genetic) - An integrated Molecular Interaction Database
MIST (protein-protein) - An integrated Molecular Interaction Database
Pathways
Signaling Pathways (FlyBase)
Metabolic Pathways
FlyBase
External Links
External Data
Linkouts
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
3-89
Cytogenetic map
Sequence location
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
96F9-96F9
Limits computationally determined from genome sequence between P{PZ}l(3)rQ197rQ197 and P{lacW}scribj7B3
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
96F-96F
(determined by in situ hybridisation)
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Stocks and Reagents
Stocks (12)
Genomic Clones (19)
cDNA Clones (27)
 

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
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       

      monoclonal

      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Nf1 mutant flies are defective in memory acquisition but not memory stability.

          The reduced life span seen in Nf1 mutants is the product of the impairment of adenylyl cyclase/cAMP/PKA signalling.

          Inactivation of Nf1 increases oxidative stress, mediated by downregulation of adenylyl cyclase/cAMP/PKA.

          One of 42 Drosophila genes identified as being most likely to reveal molecular and cellular mechanisms of nervous system development or plasticity relevant to human Mental Retardation disorders.

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

          Nf1 has a role in circadian output via the Ras/MAPK signaling pathway.

          Nf1 affects learning and short-term memory independently of its developmental effects.

          Nf1 functions either upstream of adenylyl cyclase or in a parallel pathway.

          Nf1 deficient phenotypes (reduced size, absence of a PACAP-induced rectifying potassium current at the larval neuromuscular junction) are not modified by manipulating Ras85D or Ras64B gene dosage, but rather are rescued by increasing signaling through the cAMP - PKA pathway.

          Activation of rut protein through heterotrimeric guanine nucleotide-binding protein-coupled receptor is regulated by Nf1.

          Nf1 and Pka-C1 interact in a pathway that controls the overall growth of flies.

          Nf1 is a crucial component for activation of the cAMP pathway.

          Relationship to Other Genes
          Source for database merge of
          Additional comments
          Nomenclature History
          Source for database identify of
          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (18)
          Reported As
          Symbol Synonym
          Secondary FlyBase IDs
            Datasets (0)
            Study focus (0)
            Experimental Role
            Project
            Project Type
            Title
            Study result (0)
            Result
            Result Type
            Title
            External Crossreferences and Linkouts ( 75 )
            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/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
            FlyMine - An integrated database for Drosophila genomics
            KEGG Genes - Molecular building blocks of life in the genomic space.
            MARRVEL_MODEL - MARRVEL (model organism gene)
            Linkouts
            BioGRID - A database of protein and genetic interactions.
            Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
            DroID - A comprehensive database of gene and protein interactions.
            DRSC - Results frm RNAi screens
            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
            Flygut - An atlas of the Drosophila adult midgut
            iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
            Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
            MIST (genetic) - An integrated Molecular Interaction Database
            MIST (protein-protein) - An integrated Molecular Interaction Database
            Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
            References (169)