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). Self-associates. Interacts with C2CD3 (By similarity). Interacts with BBS4, BBS8, CETN3, HAP1, NDE1, NDEL1, MAP1LC3B, GABARAPAL2, and GABARAP (PubMed:12403812, PubMed:14520415, PubMed:15107855, PubMed:16291865, PubMed:24089205, PubMed:9361024). Interacts with CEP131; the interaction increases in response to ultraviolet light (UV) radiation (PubMed:24121310). Associates with microtubule; association to microtubule is reduced in response to cellular stress, such as ultraviolet light (UV) radiation or heat shock, in a process that requires p38 MAP kinase signaling (PubMed:24121310). Interacts with CCDC113 (PubMed:25074808). Interacts with SSX2IP (By similarity). Interacts with CCDC13 (PubMed:24816561). Interacts with CEP290 (By similarity). Interacts with PARD6A (PubMed:20719959). Interacts with KIAA0753/OFIP, CEP20/FOR20 and OFD1; the interaction with CEP20/FOR20 and OFD1 may be mediated by KIAA0753/OFIP (PubMed:26643951). Interacts with CCDC66 (PubMed:28235840). Interacts with CCDC61 (PubMed:31789463). Interacts with DZIP1; localizes DZIP1 and the associated BBSome to centriolar satellite (PubMed:27979967). Interacts with CSTPP1, TTLL1, TPGS1 and LRRC49 (PubMed:34782749). 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. Expressed in blood, bone marrow, breast, lymph node, ovary and thyroid. Expression is reduced in breast and ovarian cancer. 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). 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:16769584, PubMed:16424865). 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:16769584, PubMed:16424865). Belongs to the PCM1 family. Contaminating sequence. Potential poly-A sequence. Contaminating sequence. Potential poly-A sequence. Truncated N-terminus. Contaminating sequence.