General Information
Symbol
Dmel\Marf
Species
D. melanogaster
Name
Mitochondrial assembly regulatory factor
Annotation Symbol
CG3869
Feature Type
FlyBase ID
FBgn0029870
Gene Model Status
Stock Availability
Gene Snapshot
Mitochondrial assembly regulatory factor (Marf) or mitofusin is a dynamin-family GTPase that mediates outer mitochondrial membrane tethering and fusion. Marf loss causes mitochondrial fragmentation and endoplasmic reticular stress that evoke skeletal muscle, retinal and heart tube dysfunction. [Date last reviewed: 2016-06-30]
Also Known As
dMfn, Mfn, mfn2
Genomic Location
Cytogenetic map
Sequence location
X:6,365,949..6,370,924 [+]
Recombination map
1-16
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
GO Summary Ribbons
Families, Domains and Molecular Function
Gene Group Membership (FlyBase)
Protein Family (UniProt, Sequence Similarities)
Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family. Mitofusin subfamily. (Q7YU24)
Molecular Function (see GO section for details)
Experimental Evidence
-
Predictions / Assertions
Summaries
Gene Group Membership
MITOFUSINS -
Mitofusins are GTPases of the outer mitochondrial membrane that are essential for the controlled fusion of mitochondrial membranes. (Adapted from FBrf0151407).
UniProt Contributed Function Data
Essential transmembrane GTPase, which mediates mitochondrial fusion. Fusion of mitochondria occurs in many cell types and constitutes an important step in mitochondria morphology, which is balanced between fusion and fission (By similarity).
(UniProt, Q7YU24)
Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
2

Please see the GBrowse view of Dmel\Marf or the JBrowse view of Dmel\Marf 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
Low-frequency RNA-Seq exon junction(s) not annotated.
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)
FBtr0070909
3444
810
FBtr0070910
3605
810
FBtr0343373
3617
814
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
RefSeq ID
GenBank
FBpp0089222
91.4
810
6.69
FBpp0089221
91.4
810
6.69
FBpp0310030
91.8
814
6.69
Polypeptides with Identical Sequences

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

810 aa isoforms: Marf-PB, Marf-PC
Additional Polypeptide Data and Comments
Reported size (kDa)
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\Marf using the Feature Mapper tool.

External Data
Crossreferences
Linkouts
Gene Ontology (17 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR030381
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN000049197
(assigned by GO_Central )
inferred from sequence or structural similarity with UniProtKB:O18412
(assigned by UniProt )
Biological Process (12 terms)
Terms Based on Experimental Evidence (11 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity with UniProtKB:O18412
(assigned by UniProt )
inferred from biological aspect of ancestor with PANTHER:PTN000825684
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN000825684
(assigned by GO_Central )
Cellular Component (3 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR006884, InterPro:IPR027088
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN000825684
(assigned by GO_Central )
inferred from sequence or structural similarity with UniProtKB:O18412
(assigned by UniProt )
Expression Data
Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism | ubiquitous

Comment: maternally contributed

organism

Comment: zygotically expressed; pattern not described

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: expressed more strongly in males

Additional Descriptive Data
Maternally-expressed Marf transcript is present in early embryos, but has degraded before blastoderm stage. Zygotic expression begins at embryonic stage 8. By stage 11,expression is primarily observed in the invaginating midgut and in the mesoderm. During germ band retraction, expression is observed in the developing gut, with strong expression in the midgut. Expression is also observed in somatic muscle and in pharyngeal muscle. In adult females, Marf is expressed in nurse cells and oocytes, but not in follicle cells. In adult males, Marf is expressed in premeiotic spermaticytes, primary spermatocytes, and early-stage spermatids.
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
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\Marf 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
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
Alleles, Insertions, Transgenic Constructs and Phenotypes
Classical and Insertion Alleles ( 11 )
Transgenic Constructs ( 24 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Marf
Allele of Marf
Mutagen
Associated Transgenic Construct
Stocks
Transgenic constructs containing regulatory region of Marf
Deletions and Duplications ( 2 )
Summary of Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
mitochondrion & dopaminergic neuron, with Scer\GAL4ple.PF
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (2)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
14 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?
14 of 15
Yes
Yes
11 of 15
No
Yes
Rattus norvegicus (Norway rat) (3)
13 of 13
Yes
Yes
9 of 13
No
Yes
6 of 13
No
Yes
Xenopus tropicalis (Western clawed frog) (2)
9 of 12
Yes
Yes
8 of 12
No
Yes
Danio rerio (Zebrafish) (4)
13 of 15
Yes
Yes
9 of 15
No
Yes
7 of 15
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (1)
14 of 15
Yes
Yes
Arabidopsis thaliana (thale-cress) (1)
1 of 9
Yes
Yes
Saccharomyces cerevisiae (Brewer's yeast) (1)
4 of 15
Yes
No
Schizosaccharomyces pombe (Fission yeast) (1)
5 of 12
Yes
Yes
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG091902JU )
Organism
Common Name
Gene
AAA Syntenic Ortholog
Multiple Dmel Genes in this Orthologous Group
Drosophila melanogaster
fruit fly
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) ( EOG091501JZ )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Glossina morsitans
Tsetse fly
Mayetiola destructor
Hessian fly
Aedes aegypti
Yellow fever mosquito
Anopheles darlingi
American malaria mosquito
Anopheles gambiae
Malaria mosquito
Culex quinquefasciatus
Southern house mosquito
Culex quinquefasciatus
Southern house mosquito
Orthologs in non-Dipteran Insects (via OrthoDB v9.1) ( EOG090W01C3 )
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) ( EOG090X01A3 )
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
Tetranychus urticae
Two-spotted spider mite
Daphnia pulex
Water flea
Orthologs in non-Arthropod Metazoa (via OrthoDB v9.1) ( EOG091G02ES )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Strongylocentrotus purpuratus
Purple sea urchin
Strongylocentrotus purpuratus
Purple sea urchin
Ciona intestinalis
Vase tunicate
Gallus gallus
Domestic chicken
Gallus gallus
Domestic chicken
Human Disease Model Data
FlyBase Human Disease Model Reports
Alleles Reported to Model Human Disease (Disease Ontology)
Download
Models ( 2 )
Allele
Disease
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
Interactions ( 5 )
Comments ( 0 )
 
Human Orthologs (via DIOPT v7.1)
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.
Dmel gene
Ortholog showing functional complementation
Supporting References
Interactions
Summary of Physical Interactions
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
suppressible
External Data
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.
Pathways
Gene Group - Pathway Membership (FlyBase)
External Data
Linkouts
KEGG Pathways - Wiring diagrams of molecular interactions, reactions and relations.
Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
Genomic Location and Detailed Mapping Data
Chromosome (arm)
X
Recombination map
1-16
Cytogenetic map
Sequence location
X:6,365,949..6,370,924 [+]
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
5F4-5F4
Limits computationally determined from genome sequence between P{EP}EP1402&P{EP}CG15893EP1634 and P{EP}Ctr1AEP1364&P{EP}EP1445
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Stocks and Reagents
Stocks (14)
Genomic Clones (12)
 

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

cDNA Clones (136)
 

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: Marf CG3869
    Source for database merge of
    Source for merge of: Marf anon-WO0125274.3
    Additional comments
    Source for identity of Marf CG3869 was sequence comparison ( date:020416 ).
    Source for merge of Marf anon-WO0125274.3 was sequence comparison ( date:051113 ).
    Other Comments
    Marf mutants exhibit lipid droplet accumulation in glia, but this does not lead to premature neurodegeneration.
    Origin and Etymology
    Discoverer
    Etymology
    Identification
    External Crossreferences and Linkouts ( 49 )
    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
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    Drosophila Genomics Resource Center - Drosophila Genomics Resource Center cDNA clones
    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
    Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
    Flygut - An atlas of the Drosophila adult midgut
    FlyMine - An integrated database for Drosophila genomics
    GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
    iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
    Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    KEGG Genes - Molecular building blocks of life in the genomic space.
    modMine - A data warehouse for the modENCODE project
    Synonyms and Secondary IDs (26)
    Reported As
    Symbol Synonym
    anon-WO0125274.3
    Name Synonyms
    Drosophila mitofusin
    Mitochondrial assembly regulatory factor
    mitochondria assembly regulatory factor
    mitochondrial assembly
    mitochondrial assembly regulatory factor
    mitofusin/MARF
    regulatory factor
    Secondary FlyBase IDs
    • FBgn0044368
    Datasets (0)
    Study focus (0)
    Experimental Role
    Project
    Project Type
    Title
    References (136)