FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\Jabba
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General Information
Symbol
Dmel\Jabba
Species
D. melanogaster
Name
Jabba
Annotation Symbol
CG42351
Feature Type
protein_coding_gene
FlyBase ID
FBgn0259682
Gene Model Status
Current
Stock Availability
5 publicly available
Gene Summary
Jabba (Jabba) encodes a lipid droplet protein that sequesters histones on lipid droplets. It promotes proper development of pre-cellular embryos, controls levels of nuclear histones, and mediates anti-bacterial protection. [Date last reviewed: 2019-03-07] (FlyBase Gene Snapshot)
All Summaries
Also Known As

BP1008

Key Links
Genomic Location
Cytogenetic map
55F1-55F1
Sequence location
Recombination map
2-86
RefSeq locus
NT_033778 REGION:18757074..18761082
Sequence
Get Decorated FASTA
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
NCBI
UCSC
Ensembl
PopFly
Function
Gene Ontology (GO) Annotations (3 terms)
Molecular Function (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
Biological Process (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
involved_in lipid homeostasis
inferred from mutant phenotype
(McMillan et al., 2018)
Terms Based on Predictions or Assertions (0 terms)
Cellular Component (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
located_in lipid droplet
inferred from direct assay
(McMillan et al., 2018, Li et al., 2012)
located_in plasma membrane
inferred from high throughput direct assay
(Tan et al., 2009)
Terms Based on Predictions or Assertions (0 terms)
Gene Group (FlyBase)
Protein Family (UniProt)
-
Protein Signatures (InterPro)
Summaries
Gene Snapshot
Jabba (Jabba) encodes a lipid droplet protein that sequesters histones on lipid droplets. It promotes proper development of pre-cellular embryos, controls levels of nuclear histones, and mediates anti-bacterial protection. [Date last reviewed: 2019-03-07]
Gene Model and Products
Number of Transcripts
8
Number of Unique Polypeptides
7

Please see the JBrowse view of Dmel\Jabba 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 B7YZK5)

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 5.44

Multiphase exon postulated: exon reading frame differs in alternative transcripts.

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

Gene model reviewed during 5.46

Gene model reviewed during 5.55

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
Jabba-RB
FBtr0299942
NM_137527
1323
320
Jabba-RC
FBtr0299943
NM_001144231
2029
560
Jabba-RD
FBtr0299944
NM_001144232
1622
367
Jabba-RE
FBtr0299945
NM_001144233
1628
438
Jabba-RF
FBtr0304051
NM_001202041
1925
537
Jabba-RG
FBtr0304052
NM_001202042
1663
438
Jabba-RH
FBtr0330006
NM_001274148
1667
388
Jabba-RI
FBtr0333163
NM_001274147
1567
406
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
Jabba-PB
FBpp0289219
36.0
320
4.94
Q7K1Q6
NP_611371
AAF57641
Jabba-PC
FBpp0289220
62.7
560
4.63
B7YZK5
NP_001137703
ACL83157
Jabba-PD
FBpp0289221
41.3
367
5.36
B7YZK6
NP_001137704
ACL83158
Jabba-PE
FBpp0289222
49.3
438
6.05
B7YZK4
NP_001137705
ACL83159
Jabba-PF
FBpp0293014
59.9
537
4.53
A0A0B4JCT7
NP_001188970
ADV37216
Jabba-PG
FBpp0293015
49.3
438
6.05
B7YZK4
NP_001188971
ADV37217
Jabba-PH
FBpp0303041
43.1
388
5.06
A0A0B4KFV2
NP_001261077
AGB93609
Jabba-PI
FBpp0305366
45.9
406
6.09
A0A0B4KG78
NP_001261076
AGB93608
Polypeptides with Identical Sequences

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

438 aa isoforms: Jabba-PE, Jabba-PG
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
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\Jabba 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).

-0.56

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
embryonic stage 1 -- 3
organism

Comment: maternally deposited

(Fisher et al., 2012)
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
embryonic stage 1 -- 5
organism | ubiquitous
(Arora et al., 2016)
embryonic stage 4
organism

Comment: lipid droplets

(Li et al., 2012)
adult stage | female
nurse cell

Comment: lipid droplets

(Li et al., 2012)
oocyte

Comment: lipid droplets

(Li et al., 2012)
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
adult stage
adult head
(Aradska et al., 2015)
Additional Descriptive Data
Marker for
 
lipid droplet
(Arora et al., 2016)
Subcellular Localization
CV Term
Evidence
References
located_in lipid droplet
inferred from direct assay
(McMillan et al., 2018, Li et al., 2012)
located_in plasma membrane
inferred from high throughput direct assay
(Tan et al., 2009)
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Jabba in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Bulk Downloads
RNA-Seq RPKM values for all genes
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
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
FlyBase Wiki
Image Based Resources
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 14 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 13 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Jabba
Transgenic constructs containing regulatory region of Jabba
Aberrations (Deficiencies and Duplications) ( 1 )
Inferred from experimentation ( 1 )
Gene disrupted in
Df(2R)Exel7158
(Ryder, 2004.4.26)
Inferred from location ( 4 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Downloads
Download All DIOPT Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Source
Compara
Domainoid
eggNOG
Hieranoid
Homologene
Inparanoid
OMA
OrthoDB
OrthoFinder
OrthoInspector
orthoMCL
Panther
Phylome
SonicParanoid
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (0)
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Source
Compara
Domainoid
eggNOG
Hieranoid
Homologene
Inparanoid
OMA
OrthoDB
OrthoFinder
OrthoInspector
orthoMCL
Panther
Phylome
SonicParanoid
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (0)
Mus musculus (laboratory mouse) (0)
Xenopus tropicalis (Western clawed frog) (0)
Danio rerio (Zebrafish) (0)
Caenorhabditis elegans (Nematode, roundworm) (0)
Anopheles gambiae (African malaria mosquito) (1)
Agam\AgaP_AGAP007647
6 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (0)
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Jabba. Refer to their site for version information.
Paralogs
Downloads
Download All DIOPT Paralogs
Paralogs (via DIOPT v9.1)
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.
    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
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-86
    Cytogenetic map
    55F1-55F1
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    55F1-55F1
    Limits computationally determined from genome sequence between P{EP}EP437 and P{PZ}l(2)0370903709
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location

    2-86

    (FlyBase, 2016)

    2-91.3

    (Comeron et al., 2012)
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (5)
    Genomic Clones (13)
     

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

    cDNA Clones (33)
     

    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
      Other clones
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       

      polyclonal

      (Johnson et al., 2018, Li et al., 2012)
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Area matching Drosophila genomic sequence AC004345. ESTs AI515537 and AI062109 match this genomic sequence 50bp 3' to NPS0219.

          (Davies, 2001.3.15)
          Relationship to Other Genes
          Source for database merge of

          Source for merge of: CG15092 CG34020

          (FlyBase Genome Annotators, 2008)

          Source for merge of: CG15092 anon-WO0118547.167

          (FlyBase, 1996-)
          Additional comments

          Annotations CG15092 and CG34020 merged as CG42351 in release 5_9 of the genome annotation.

          (FlyBase Genome Annotators, 2008)

          The 3' part of release 2 annotation CG15092 (which was deleted in the release 3 version of CG15092) has been restored as a distinct annotation, CG34020, in release 4.3 of the genome annotation.

          (FlyBase Genome Annotators, 2005)

          Source for merge of CG15092 anon-WO0118547.167 was sequence comparison ( date:051113 ).

          (FlyBase, 1996-)
          Nomenclature History
          Source for database identify of

          Source for identity of: CG34020 BP1008

          (FlyBase Genome Annotators, 2005)

          Source for identity of: Jabba CG42351

          (Li et al., 2012)
          Nomenclature comments
          Etymology

          Lipid droplets of mutant embryos are unevenly distributed and irregularly shaped, a phenotype that inspired the name "Jabba".

          (Li et al., 2012)
          Synonyms and Secondary IDs (8)
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 64 )
          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.
          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
          InterPro - A database of protein families, domains and functional sites
          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
          MIST (protein-protein) - An integrated Molecular Interaction Database
          References (64)