CENPJ

Last updated
CENPJ
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases CENPJ , BM032, CENP-J, CPAP, LAP, LIP1, MCPH6, SASS4, SCKL4, Sas-4, centromere protein J
External IDs OMIM: 609279 MGI: 2684927 HomoloGene: 10204 GeneCards: CENPJ
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_018451

NM_001014996

RefSeq (protein)

NP_060921

NP_001014996
NP_001390462
NP_001390463

Location (UCSC) Chr 13: 24.88 – 24.92 Mb Chr 14: 56.76 – 56.81 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Centromere protein J is a protein that in humans is encoded by the CENPJ gene. [5] [6] It is also known as centrosomal P4.1-associated protein (CPAP). During cell division, this protein plays a structural role in the maintenance of centrosome integrity and normal spindle morphology, and it is involved in microtubule disassembly at the centrosome. This protein can function as a transcriptional coactivator in the Stat5 signaling pathway and also as a coactivator of NF-kappaB-mediated transcription, likely via its interaction with the coactivator p300/CREB-binding protein.

Contents

The Drosophila ortholog, sas-4, has been shown to be a scaffold for a cytoplasmic complex of Cnn, Asl, CP-190, tubulin and D-PLP (similar to the human proteins PCNT and AKAP9). These complexes are then anchored at the centriole to begin formation of the centrosome. [7]

Model organisms

Model organisms have been used in the study of CENPJ function. A conditional knockout mouse line, called Cenpjtm1a(EUCOMM)Wtsi [21] [22] was generated as part of the International Knockout Mouse Consortium program—a high-throughput mutagenesis project to generate and distribute animal models of disease to interested scientists. [23] [24] [25]

Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. [19] [26] Twenty five tests were carried out on mutant mice and thirteen significant abnormalities were observed. Homozygous mutants were subviable, had a decreased body weight, abnormal open field, body composition, X-ray imaging, peripheral blood lymphocytes and indirect calorimetry parameters, abnormal head, genitalia and tail morphology, an impaired glucose tolerance, hypoalbuminemia, a 1.5 fold increase in micronuclei, a reduction in dentate gyrus length and abnormal corneal epithelium and endothelium. [19]

A more detailed analysis revealed this mutant to model a number of aspects of Seckel syndrome (type 4). The authors concluded that, "increased cell death due to mitotic failure during embryonic development is likely to contribute to the proportionate dwarfism" that is characteristic of the disorder. [27]

Clinical significance

Mutations in CENPJ are associated with Seckel syndrome type 4 and primary autosomal recessive microcephaly, a disorder characterized by severely reduced brain size and intellectual disability. [6] [28] [29] Interestingly, CENPJ interacts with other microcephaly aossciated proteins such as WDR62 and both coordinate a regulatory function neocortical development and brain growth. [30]

Interactions

CENPJ has been shown to interact with EPB41. [5]

See also

Related Research Articles

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References

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  6. 1 2 "Entrez Gene: CENPJ centromere protein J".
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  13. "DEXA data for Cenpj". Wellcome Trust Sanger Institute.
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  16. "Peripheral blood lymphocytes data for Cenpj". Wellcome Trust Sanger Institute.
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  27. McIntyre RE, Lakshminarasimhan Chavali P, Ismail O, Carragher DM, Sanchez-Andrade G, Forment JV, Fu B, Del Castillo Velasco-Herrera M, Edwards A, van der Weyden L, Yang F, Ramirez-Solis R, Estabel J, Gallagher FA, Logan DW, Arends MJ, Tsang SH, Mahajan VB, Scudamore CL, White JK, Jackson SP, Gergely F, Adams DJ (2012). "Disruption of mouse Cenpj, a regulator of centriole biogenesis, phenocopies Seckel syndrome". PLOS Genetics. 8 (11): e1003022. doi:10.1371/journal.pgen.1003022. PMC   3499256 . PMID   23166506.
  28. Al-Dosari MS, Shaheen R, Colak D, Alkuraya FS (Jun 2010). "Novel CENPJ mutation causes Seckel syndrome". Journal of Medical Genetics. 47 (6): 411–4. doi:10.1136/jmg.2009.076646. PMID   20522431. S2CID   35159613.
  29. Gul A, Hassan MJ, Hussain S, Raza SI, Chishti MS, Ahmad W (2006). "A novel deletion mutation in CENPJ gene in a Pakistani family with autosomal recessive primary microcephaly". Journal of Human Genetics. 51 (9): 760–4. doi: 10.1007/s10038-006-0017-1 . PMID   16900296.
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Further reading