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Symbol CKAP2 contributors: mct - updated : 13-10-2014
HGNC name cytoskeleton associated protein 2
HGNC id 1990
Location 13q14.3      Physical location : 53.029.494 - 53.050.763
Synonym name
  • cytoskeletal associated protein differentially expressed in diffuse large B cell lymphomas
  • tumor-associated microtubule-associated protein
  • Synonym symbol(s) LB1, TMAP, se20-10
    TYPE virus associated
    STRUCTURE 21.27 kb     9 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Promoter
    text structure
  • upstream 115-bp region from the transcription start site was sufficient for minimal CKAP2 promoter activity
  • GC box was responsible for the cyclic activity of human CKAP2 promoter through the phosphorylation of Sp1, possibly by Cyclin A/Cdk complex
  • temporal change of GC box-binding affinity of Sp1 was responsible for the cyclic expression of human CKAP2
  • MAPPING cloned Y linked   status confirmed
    Physical map
    LOC341674 13q14.13 similar to ribosomal protein L5; 60S ribosomal protein L5 FLJ30707 13q14.13 hypothetical protein FLJ30707 DDX26 13q14.12-q14.2 DEAD/H (Asp-Glu-Ala-Asp/His) box polypeptide 26 LOC220433 13q14.13 similar to ribosomal protein S4, X-linked WDFY2 13q14.12 WD repeat and FYVE domain containing 2 FLJ13639 13q14.2 hypothetical protein FLJ13639 FLJ37307 13q14.2 hypothetical protein FLJ37307 DKFZP434K1172 13q14.2 hypothetical protein DKFZp434K1172 LOC387926 13 hypothetical gene supported by AF338231; BC030655 ATP7B 13q14.3 ATPase, Cu++ transporting, beta polypeptide (Wilson disease) KIAA0266 13q12.2-q13.3 KIAA0266 protein LOC387927 13 similar to BB049667 protein MGC75495 13q14.2 similar to Serine/threonine-protein kinase Nek1 (NimA-related protein kinase 1) NEK3 13q14.2-q21.1 NIMA (never in mitosis gene a)-related kinase 3 LOC387928 13 similar to mitochondrial ribosomal protein S31; imogen 38 TPTEps1 13q14.2 TPTE and PTEN homologous inositol lipid phosphatase pseudogene THSD1 13q14.13 thrombospondin, type I, domain 1 C13orf9 13q14.13 chromosome 13 open reading frame 9 CKAP2 13q14 cytoskeleton associated protein 2 LOC387929 13 LOC387929 LOC220115 13q14.2 TPTE pseudogene LOC144983 13q14.2 hypothetical protein LOC144983 SUGT1 13q14.2 SGT1, suppressor of G2 allele of SKP1 (S. cerevisiae) LECT1 13q14-q21 leukocyte cell derived chemotaxin 1 LOC121981 13q14.2 similar to peptidyl-Pro cis trans isomerase PCDH8 13q14.3 protocadherin 8 GW112 13q14.2 differentially expressed in hematopoietic lineages
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    9 splicing 3736 76 682 - Bae
  • using an alternate splice acceptor site at the beginning of the third coding exon
  • 9 exons
  • 9 splicing 3739 76 683 - Bae
  • using an alternate splice acceptor site at the beginning of the third coding exon resulting in a protein isoform that is longer by a single amino acid
  • 6 - 2073 - 494 - -
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Digestiveesophagus   moderately
     liver   highly
    Lymphoid/Immunelymph node   highly
    Reproductivemale systemtestis  highly
     male systemprostate  highly
    Urinarybladder   highly
     kidney   highly
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Blood / hematopoieticbone marrow  moderately
    Connectivebone  moderately
    cell lineage
    cell lines
    at STAGE
    interspecies homolog to rattus Ckap2 (63.1 pc)
    homolog to murine Ckap2 (64.2 pc)
    CATEGORY regulatory
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,cytoplasm,cytoskeleton,microtubule,mitotic spindle
  • microtubule-associated protein that localizes to spindle poles
  • expression of CKAP2 in the normal human tissues was limited to well-known cell proliferation zones
  • basic FUNCTION
  • involved in microtubule stabilization
  • involved in regulating aneuploidy, cell cycling, and cell death in a p53/TP53-dependent manner
  • plays a role in the assembly and maintenance of mitotic spindles, presumably by regulating microtubule dynamics, and its destruction during mitotic exit serves an important role in the completion of cytokinesis and in the maintenance of spindle bipolarity in the next mitosis (Hong 2007)
  • mitotic spindle-associated protein which is frequently up-regulated in various malignances
  • is essential for proper chromosome segregation and for maintaining genomic stability
  • involved in the assembly and maintenance of mitotic spindle and also plays an essential role in maintaining the fidelity of chromosome segregation during mitosis
  • plays crucial roles in proper chromosome segregation and maintaining genomic stability
  • microtubule-associated protein that localizes to spindle poles and aids in microtubule stabilization
  • is involved in the maintenance of microtubule nucleation sites, focusing microtubule minus ends to the spindle poles in early mitosis, and is implicated in maintaining genome stability
  • CELLULAR PROCESS cell cycle
    cell life, cell death/apoptosis
    a component
    small molecule
  • associating with alpha- and beta-tubulins
  • is a novel substrate of the Aurora B kinase
  • SP1 is a major regulator of periodic expression of CKAP2, and cell-cycle-dependent phosphorylation of SP1 mediated by CCNA2 can regulate the DNA-binding affinity of SP1
  • RPS6KA1 regulates anchorage-independent growth through transcriptional regulation of factors that modulate cell survival, including ING3, CKAP2, and PTK6
  • cell & other
    Other cellular functions of CKAP2 might be regulated by timely phosphorylation and dephosphorylation during the course of mitosis
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional     --over  
    resulted in cell cycle arrest during mitosis due to a defect in centrosome separation and subsequent formation of a monopolar spindle (Hong 2007)
    tumoral     --over  
    in gastric cancers and large B-cell lymphoma
    Variant & Polymorphism
    Candidate gene
    Therapy target