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General Information
Symbol
Dmel\Mcm3
Species
D. melanogaster
Name
Minichromosome maintenance 3
Annotation Symbol
CG4206
Feature Type
FlyBase ID
FBgn0284442
Gene Model Status
Stock Availability
Gene Summary
Minichromosome maintenance 3 (Mcm3) encodes a component of the MCM2-7 hexamer, which forms part of the CMG complex, together with the product of CDC45L and GINS proteins. The CMG complex is the main DNA helicase that functions during DNA replication. [Date last reviewed: 2019-03-28] (FlyBase Gene Snapshot)
Also Known As

small mushroom bodies, smu, DmMCM3

Key Links
Genomic Location
Cytogenetic map
Sequence location
X:5,323,855..5,326,738 [+]
Recombination map
1-11
RefSeq locus
NC_004354 REGION:5323855..5326738
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Gene Ontology (GO) Annotations (14 terms)
Molecular Function (4 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
enables ATP binding
inferred from electronic annotation with InterPro:IPR001208, InterPro:IPR008046, InterPro:IPR018525
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN000179711
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN000179711
(assigned by GO_Central )
Biological Process (7 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from mutant phenotype
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR001208, InterPro:IPR031327
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN000179713
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN000179713
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN000179713
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN000179713
(assigned by GO_Central )
Cellular Component (3 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
part_of CMG complex
inferred from direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
part_of MCM complex
inferred from biological aspect of ancestor with PANTHER:PTN000179711
(assigned by GO_Central )
is_active_in nucleus
inferred from biological aspect of ancestor with PANTHER:PTN000179711
(assigned by GO_Central )
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the MCM family. (Q9XYU1)
Summaries
Gene Snapshot
Minichromosome maintenance 3 (Mcm3) encodes a component of the MCM2-7 hexamer, which forms part of the CMG complex, together with the product of CDC45L and GINS proteins. The CMG complex is the main DNA helicase that functions during DNA replication. [Date last reviewed: 2019-03-28]
Gene Group (FlyBase)
MCM2-7 COMPLEX -
The heterohexameric MCM2-7 complex is the helicase motor of the CMG (Cdc45-MCM-GINS) replicative helicase of eukaryotes. The six MCM subunits are related to one another and are members of the AAA+ (ATPases associated with diverse cellular activities) superfamily. Hydrolysis of ATP by the individual MCM subunits catalyses the conformational changes that drive unwinding of the DNA duplex. However, the eukaryotic MCM complex alone has no or little helicase activity, requiring the other components of the CMG complex (Cdc45 and the GINS complex) for activation. (Adapted from PMID:23412083.)
CMG COMPLEX -
The CMG (Cdc45-MCM-GINS) complex is the eukaryotic replicative helicase, the enzyme that unwinds double-stranded DNA at replication forks. It is a macromolecular assembly of three replication factors: the Cdc45 protein, and the MCM and GINS complexes. All three components are essential for CMG function, with the MCM2-7 complex functioning as the molecular motor that harnesses the energy of ATP hydrolysis to catalyse strand separation. (Adapted from PMID:23412083.)
Protein Function (UniProtKB)
Acts as component of the Mcm2-7 complex (Mcm complex) (Mcm complex) which is the putative replicative helicase essential for 'once per cell cycle' DNA replication initiation and elongation in eukaryotic cells. The active ATPase sites in the Mcm2-7 ring are formed through the interaction surfaces of two neighboring subunits such that a critical structure of a conserved arginine finger motif is provided in trans relative to the ATP-binding site of the Walker A box of the adjacent subunit. The six ATPase active sites, however, are likely to contribute differentially to the complex helicase activity.
(UniProt, Q9XYU1)
Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
2

Please see the JBrowse view of Dmel\Mcm3 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 5.50

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0070762
2747
819
FBtr0340476
2744
818
Additional Transcript Data and Comments
Reported size (kB)

3.0 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0070729
90.9
819
6.35
FBpp0309417
90.8
818
6.26
Polypeptides with Identical Sequences

None of the polypeptides share 100% sequence identity.

Additional Polypeptide Data and Comments
Reported size (kDa)

819 (aa); 90.0 (kD predicted)

Comments
External Data
Subunit Structure (UniProtKB)

Component of the Mcm2-7 complex. The complex forms a toroidal hexameric ring with the proposed subunit order Mcm2-Mcm6-Mcm4-Mcm7-Mcm3-Mcm5 (Probable).

(UniProt, Q9XYU1)
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\Mcm3 using the Feature Mapper tool.

External Data
Crossreferences
Linkouts
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

antennal primordium

Comment: reported as procephalic ectoderm primordium

central brain primordium

Comment: reported as procephalic ectoderm primordium

visual primordium

Comment: reported as procephalic ectoderm primordium

dorsal head epidermis primordium

Comment: reported as procephalic ectoderm primordium

lateral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

ventral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

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

Comment: reference states 0-4 hr AEL

Additional Descriptive Data

Mcm3 transcript expression pattern resembles that of DNA replication. Mcm3 transcript is detected at high levels in the central nervous system and at very low levels in the gut of stage 11-12 embryos.

Mcm3 transcript levels are high in unfertilized eggs, slightly higher in 2-4 hour embryos, and are lower after 4 hours of embryogenesis. Levels are low in other developmental stages, with the exception of adult females.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
part_of CMG complex
inferred from direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

GBrowse - Visual display of RNA-Seq signals

View Dmel\Mcm3 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
EMBL-EBI Single Cell Expression Atlas
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 1 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 6 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Mcm3
Transgenic constructs containing regulatory region of Mcm3
Aberrations (Deficiencies and Duplications) ( 4 )
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v8.0)
Homo sapiens (Human) (9)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
14 of 15
Yes
Yes
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
Yes
1 of 15
No
No
Model Organism Orthologs (via DIOPT v8.0)
Mus musculus (laboratory mouse) (8)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
13 of 15
Yes
Yes
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
Yes
Rattus norvegicus (Norway rat) (10)
13 of 13
Yes
Yes
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
Xenopus tropicalis (Western clawed frog) (10)
13 of 12
Yes
Yes
12 of 12
No
Yes
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
Yes
Danio rerio (Zebrafish) (11)
14 of 15
Yes
Yes
13 of 15
No
Yes
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
2 of 15
No
Yes
1 of 15
No
No
Caenorhabditis elegans (Nematode, roundworm) (6)
12 of 15
Yes
Yes
2 of 15
No
No
2 of 15
No
No
2 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Arabidopsis thaliana (thale-cress) (8)
9 of 9
Yes
Yes
1 of 9
No
No
1 of 9
No
No
1 of 9
No
No
1 of 9
No
No
1 of 9
No
No
1 of 9
No
Yes
1 of 9
No
No
Saccharomyces cerevisiae (Brewer's yeast) (6)
12 of 15
Yes
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
Schizosaccharomyces pombe (Fission yeast) (1)
11 of 12
Yes
Yes
Ortholog(s) in Drosophila Species (via OrthoDB v9.1) ( EOG091902KP )
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) ( EOG091501HZ )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Lucilia cuprina
Australian sheep blowfly
Mayetiola destructor
Hessian fly
Mayetiola destructor
Hessian fly
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) ( EOG090W026I )
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) ( EOG090X01I1 )
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) ( EOG091G02B0 )
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
Paralogs
Paralogs (via DIOPT v8.0)
Drosophila melanogaster (Fruit fly) (7)
4 of 10
4 of 10
4 of 10
4 of 10
4 of 10
4 of 10
1 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 ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v8.0 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
    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
    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 the Mcm2-7 complex. The complex forms a toroidal hexameric ring with the proposed subunit order Mcm2-Mcm6-Mcm4-Mcm7-Mcm3-Mcm5 (Probable).
    (UniProt, Q9XYU1 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    External Data
    Linkouts
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-11
    Cytogenetic map
    Sequence location
    X:5,323,855..5,326,738 [+]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    4F5-4F12
    Limits computationally determined from genome sequence between P{EP}EP425 and P{EP}CG3249EP1400; Left limit from (method unavailable) (FBrf0090884) Right limit from (method unavailable) (FBrf0090884)
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Mcm3 maps to 4F9-10/5A1-2.
    4F9-5A2
    (determined by in situ hybridisation)
    4F-4F
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (4)
    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 GBrowse 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)
      RNAi and Array Information
      Linkouts
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Other Information
      Relationship to Other Genes
      Source for database identify of

      Source for identity of: Mcm3 CG4206

      Source for database merge of

      Source for merge of: Mcm3 Mcp-PCR2

      Source for merge of: Mcm3 smu

      Additional comments
      Other Comments

      The Sld5, Psf1, Psf2, Psf3, CDC45L, Mcm2, Mcm3, Mcm5, Mcm6, Mcm7 and dpa proteins form the Cdc45/Mcm2-7/GINS (CMG) complex, a helicase required for the S phase transition in Kc cells.

      Origin and Etymology
      Discoverer
      Etymology
      Identification
      External Crossreferences and Linkouts ( 40 )
      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
      UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
      Linkouts
      BioGRID - A database of protein and genetic interactions.
      FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
      KEGG Pathways - Wiring diagrams of molecular interactions, reactions and relations.
      Synonyms and Secondary IDs (16)
      Reported As
      Secondary FlyBase IDs
      • FBgn0024332
      • FBgn0020632
      • FBgn0019654
      Datasets (1)
      Study focus (1)
      Experimental Role
      Project
      Project Type
      Title
      • bait_protein
      Genome-wide localization of essential replication factors characterized by ChIP-Seq and ChIP-chip.
      References (101)