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    MUC16 mucin 16, cell surface associated [ Homo sapiens (human) ]

    Gene ID: 94025, updated on 12-Apr-2026
    Official Symbol
    MUC16provided by HGNC
    Official Full Name
    mucin 16, cell surface associatedprovided by HGNC
    Primary source
    HGNC:HGNC:15582
    See related
    Ensembl:ENSG00000181143 MIM:606154; AllianceGenome:HGNC:15582
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Homo sapiens
    Lineage
    Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
    Also known as
    CA125
    Summary
    This gene encodes a protein that is a member of the mucin family. Mucins are high molecular weight, O-glycosylated proteins that play an important role in forming a protective mucous barrier, and are found on the apical surfaces of the epithelia. The encoded protein is a membrane-tethered mucin that contains an extracellular domain at its amino terminus, a large tandem repeat domain, and a transmembrane domain with a short cytoplasmic domain. The amino terminus is highly glycosylated, while the repeat region contains 156 amino acid repeats unit that are rich in serines, threonines, and prolines. Interspersed within the repeats are Sea urchin sperm protein Enterokinase and Agrin (SEA) modules, leucine-rich repeats and ankyrin (ANK) repeats. These regions together form the ectodomain, and there is a potential cleavage site found near an SEA module close to the transmembrane domain. This protein is thought to play a role in forming a barrier, protecting epithelial cells from pathogens. Products of this gene have been used as a marker for different cancers, with higher expression levels associated with poorer outcomes. [provided by RefSeq, May 2017]
    Annotation information
    Annotation category: suggests misassembly
    Annotation category: partial on reference assembly
    Expression
    Low expression observed in reference dataset See more
    Orthologs
    Try the new Gene page
    Try the new Transcripts and proteins table
    See MUC16 in Genome Data Viewer
    Location:
    19p13.2
    Exon count:
    92
    Annotation release Status Assembly Chr Location
    RS_2025_08 current GRCh38.p14 (GCF_000001405.40) 19 NC_000019.10 (8848844..9065751, complement)
    RS_2025_08 current T2T-CHM13v2.0 (GCF_009914755.1) 19 NC_060943.1 (8959807..9191530, complement)
    RS_2024_09 previous assembly GRCh37.p13 (GCF_000001405.25) 19 NC_000019.9 (8959520..9176427, complement)

    Chromosome 19 - NC_000019.10Genomic Context describing neighboring genes Neighboring gene ribosomal protein L23a pseudogene 78 Neighboring gene olfactory receptor family 2 subfamily Z member 1 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 10035 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 10036 Neighboring gene zinc finger protein 558 Neighboring gene methyl-CpG binding domain protein 3 like 1 Neighboring gene P300/CBP strongly-dependent group 1 enhancer GRCh37_chr19:9070485-9071684 Neighboring gene MPRA-validated peak3341 silencer Neighboring gene MED14-independent group 3 enhancer GRCh37_chr19:9150106-9151305 Neighboring gene bolA family member 3 pseudogene 2 Neighboring gene tRNA-Gln (anticodon TTG) 8-1 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr19:9160639-9161138 Neighboring gene NANOG-H3K27ac hESC enhancer GRCh37_chr19:9165241-9165920 Neighboring gene OCT4-NANOG-H3K27ac hESC enhancer GRCh37_chr19:9180050-9180984 Neighboring gene OCT4-NANOG-H3K27ac hESC enhancer GRCh37_chr19:9180985-9181918 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr19:9184777-9185664 Neighboring gene olfactory receptor family 1 subfamily M member 4 pseudogene Neighboring gene olfactory receptor family 1 subfamily M member 1

    • Project title: Tissue-specific circular RNA induction during human fetal development
    • Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
    • BioProject: PRJNA270632
    • Publication: PMID 26076956
    • Analysis date: Mon Apr 2 22:54:59 2018

    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?
    Products Interactant Other Gene Complex Source Pubs Description

    Markers

    Clone Names

    • FLJ14303

    Gene Ontology Provided by GOA

    Function Evidence Code Pubs
    enables protein binding IPI
    Inferred from Physical Interaction
    more info
    PubMed 
    Process Evidence Code Pubs
    involved_in cell adhesion NAS
    Non-traceable Author Statement
    more info
    PubMed 
    Component Evidence Code Pubs
    located_in Golgi lumen TAS
    Traceable Author Statement
    more info
     
    located_in external side of plasma membrane IDA
    Inferred from Direct Assay
    more info
    PubMed 
    located_in extracellular exosome HDA PubMed 
    located_in extracellular region IEA
    Inferred from Electronic Annotation
    more info
     
    located_in plasma membrane IEA
    Inferred from Electronic Annotation
    more info
     
    located_in plasma membrane TAS
    Traceable Author Statement
    more info
     
    located_in vesicle HDA PubMed 
    Preferred Names
    mucin-16
    Names
    CA125 ovarian cancer antigen
    cancer antigen 125
    ovarian cancer-related tumor marker CA125
    ovarian carcinoma antigen CA125
    NP_001388430.1

    Length

    • 15349
    NP_001401615.1

    Length

    • 15491
    NP_001401616.1

    Length

    • 15309

    NEW Try the new Transcript table

    RefSeqs maintained independently of Annotated Genomes

    These reference sequences exist independently of genome builds. Explain

    These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

    Genomic

    1. NG_055257.1 RefSeqGene

      Range
      34049..166547
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_001401501.2NP_001388430.1  mucin-16 isoform 2 precursor

      Status: REVIEWED

      Source sequence(s)
      AC008734, AC016584, KF456494, LJII02000148
      UniProtKB/TrEMBL
      A0AAG2UXD3, A0AAG2UXK0
    2. NM_001414686.1NP_001401615.1  mucin-16 isoform 1 precursor

      Status: REVIEWED

      Source sequence(s)
      AC008734, AC016584, KF456494, LJII02000148
      UniProtKB/TrEMBL
      A0AAG2UXD3
    3. NM_001414687.1NP_001401616.1  mucin-16 isoform 3

      Status: REVIEWED

      Source sequence(s)
      AC008734, AC016584, KF456494, LJII02000148
      UniProtKB/TrEMBL
      A0AAG2UUZ0
    4. NM_024690.2NP_078966.2  mucin-16 isoform 4

      See identical proteins and their annotated locations for NP_078966.2

      Status: REVIEWED

      Source sequence(s)
      AC008734, AC016584, AF361486, AF414442, AK128681, AK128857, BF359193, BI256451
      Consensus CDS
      CCDS54212.1
      UniProtKB/Swiss-Prot
      B5ME49, Q6ZQW5, Q8WXI7, Q96RK2
      UniProtKB/TrEMBL
      A0AA34QW05
      Related
      ENSP00000381008.2, ENST00000397910.8
      Conserved Domains (1) summary
      pfam01390
      Location:1347913576
      SEA; SEA domain

    RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2025_08

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh38.p14 Primary Assembly

    Genomic

    1. NC_000019.10 Reference GRCh38.p14 Primary Assembly

      Range
      8848844..9065751 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Reference GRCh38.p14 PATCHES

    Genomic

    1. NW_025791807.1 Reference GRCh38.p14 PATCHES

      Range
      83787..315519 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Alternate T2T-CHM13v2.0

    Genomic

    1. NC_060943.1 Alternate T2T-CHM13v2.0

      Range
      8959807..9191530 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)