PCM1

Function

Required for centrosome assembly and function (PubMed:12403812, PubMed:15659651, PubMed:16943179). Essential for the correct localization of several centrosomal proteins including CEP250, CETN3, PCNT and NEK2 (PubMed:12403812, PubMed:15659651). Required to anchor microtubules to the centrosome (PubMed:12403812, PubMed:15659651). Also involved in cilium biogenesis by recruiting the BBSome, a ciliary protein complex involved in cilium biogenesis, to the centriolar satellites (PubMed:20551181, PubMed:24121310, PubMed:27979967). Recruits the tubulin polyglutamylase complex (TPGC) to centriolar satellites (PubMed:34782749).

Involvement in disease

A chromosomal aberration involving PCM1 is found in papillary thyroid carcinomas (PTCs) (PubMed:10980597). Translocation t(8;10)(p21.3;q11.2) with RET links the protein kinase domain of RET to the major portion of PCM1 (PubMed:10980597).

A chromosomal aberration involving PCM1 is found in a variety of hematological malignancies including atypical chronic myeloid leukemia (atypical CML) and T-cell lymphoma (PubMed:15805263, PubMed:16034466, PubMed:16091753, PubMed:16424865, PubMed:16769584). Translocation t(8;9)(p22;p24) with JAK2 links the protein kinase domain of JAK2 to the major portion of PCM1 (PubMed:15805263, PubMed:16034466, PubMed:16091753, PubMed:16424865, PubMed:16769584).

Post-translational modifications

Ubiquitinated. Undergoes monoubiquitination catalyzed by the E3 ubiquitin-protein ligase MIB1 in proliferating cells, preventing cilia formation (PubMed:24121310). Monoubiquitination by MIB1 is inhibited in response to cellular stress, such as ultraviolet light (UV) radiation or heat shock, resulting in cilia formation initiation (PubMed:24121310).

Variant Ser-159 is phosphorylated.

Phosphorylated on multiple serine and threonine residues by DYRK3 during the G2-to-M transition, after the nuclear-envelope breakdown (PubMed:29973724). Phosphorylation by DYRK3 promotes disassembly of pericentriolar material (PubMed:29973724). Phosphorylation at Ser-372 mediated by PLK4 is required to maintain the integrity of centriolar satellites (PubMed:30804208).

Sequence Similarities

Belongs to the PCM1 family.

Tissue Specificity

Expressed in blood, bone marrow, breast, lymph node, ovary and thyroid.

Cellular localization

• Cytoplasm
• Cytoskeleton
• Cytoplasm
• Cytoskeleton
• Microtubule organizing center
• Centrosome
• Cytoplasmic granule
• Cytoplasm
• Cytoskeleton
• Microtubule organizing center
• Centrosome
• Centriolar satellite
• Cytoplasm
• Cytoskeleton
• Cilium basal body
• Recruitment to the centrosome requires microtubules and dynein. The majority of the protein dissociates from the centrosome during metaphase and subsequently localizes to the cleavage site in telophase. Displaced from centriolar satellites and centrosome in response to cellular stress, such as ultraviolet light (UV) radiation or heat shock, in a process that requires p38 MAP kinase signaling.

Alternative names

Pericentriolar material 1 protein, PCM-1, hPCM-1, PCM1

Database links

swissprot:Q15154 entrezGene:5979 entrezGene:5108 swissprot:P07949 omim:600299 omim:164761

Other research areas

• Immuno-oncology