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Structural highlights

Disease

[VRK1_HUMAN] Pontocerebellar hypoplasia type 1. The disease is caused by mutations affecting the gene represented in this entry.

Function

[VRK1_HUMAN] Serine/threonine kinase involved in Golgi disassembly during the cell cycle: following phosphorylation by PLK3 during mitosis, required to induce Golgi fragmentation. Acts by mediating phosphorylation of downstream target protein. Phosphorylates 'Thr-18' of p53/TP53 and may thereby prevent the interaction between p53/TP53 and MDM2. Phosphorylates casein and histone H3. Phosphorylates BANF1: disrupts its ability to bind DNA, reduces its binding to LEM domain-containing proteins and causes its relocalization from the nucleus to the cytoplasm. Phosphorylates ATF2 which activates its transcriptional activity.^{[1] [2] [3] [4] [5] [6]}

See Also

• Serine/threonine protein kinase

References

1. ↑ Lopez-Borges S, Lazo PA. The human vaccinia-related kinase 1 (VRK1) phosphorylates threonine-18 within the mdm-2 binding site of the p53 tumour suppressor protein. Oncogene. 2000 Jul 27;19(32):3656-64. PMID:10951572 doi:http://dx.doi.org/10.1038/sj.onc.1203709
2. ↑ Nichols RJ, Traktman P. Characterization of three paralogous members of the Mammalian vaccinia related kinase family. J Biol Chem. 2004 Feb 27;279(9):7934-46. Epub 2003 Nov 25. PMID:14645249 doi:http://dx.doi.org/10.1074/jbc.M310813200
3. ↑ Sevilla A, Santos CR, Vega FM, Lazo PA. Human vaccinia-related kinase 1 (VRK1) activates the ATF2 transcriptional activity by novel phosphorylation on Thr-73 and Ser-62 and cooperates with JNK. J Biol Chem. 2004 Jun 25;279(26):27458-65. Epub 2004 Apr 21. PMID:15105425 doi:http://dx.doi.org/10.1074/jbc.M401009200
4. ↑ Nichols RJ, Wiebe MS, Traktman P. The vaccinia-related kinases phosphorylate the N' terminus of BAF, regulating its interaction with DNA and its retention in the nucleus. Mol Biol Cell. 2006 May;17(5):2451-64. Epub 2006 Feb 22. PMID:16495336 doi:http://dx.doi.org/10.1091/mbc.E05-12-1179
5. ↑ Sanz-Garcia M, Lopez-Sanchez I, Lazo PA. Proteomics identification of nuclear Ran GTPase as an inhibitor of human VRK1 and VRK2 (vaccinia-related kinase) activities. Mol Cell Proteomics. 2008 Nov;7(11):2199-214. doi: 10.1074/mcp.M700586-MCP200., Epub 2008 Jul 9. PMID:18617507 doi:10.1074/mcp.M700586-MCP200
6. ↑ Lopez-Sanchez I, Sanz-Garcia M, Lazo PA. Plk3 interacts with and specifically phosphorylates VRK1 in Ser342, a downstream target in a pathway that induces Golgi fragmentation. Mol Cell Biol. 2009 Mar;29(5):1189-201. doi: 10.1128/MCB.01341-08. Epub 2008 Dec , 22. PMID:19103756 doi:10.1128/MCB.01341-08