4d2p: Difference between revisions

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'''Unreleased structure'''
==Structure of MELK in complex with inhibitors==
 
<StructureSection load='4d2p' size='340' side='right' caption='[[4d2p]], [[Resolution|resolution]] 2.55&Aring;' scene=''>
The entry 4d2p is ON HOLD
== Structural highlights ==
 
<table><tr><td colspan='2'>[[4d2p]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D2P OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4D2P FirstGlance]. <br>
Authors: Johnson, C.N., Berdini, V., Beke, L., Bonnet, P., Brehmer, D., Coyle, J.E., Day, P.J., Frederickson, M., Freyne, E.J.E., Gilissen, R.A.H.J., Hamlett, C.C.F., Howard, S., Meerpoel, L., McMenamin, R., Patel, S., Rees, D.C., Sharff, A., Sommen, F., Wu, T., Linders, J.T.M., ,
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=6Z7:7-({4-[(3-HYDROXY-5-METHOXYPHENYL)AMINO]BENZOYL}AMINO)-1,2,3,4-TETRAHYDROISOQUINOLINIUM'>6Z7</scene></td></tr>
 
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4d2t|4d2t]], [[4d2v|4d2v]], [[4d2w|4d2w]]</td></tr>
Description: Structure of MELK in complex with inhibitors
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4d2p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4d2p OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4d2p RCSB], [http://www.ebi.ac.uk/pdbsum/4d2p PDBsum]</span></td></tr>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/MELK_HUMAN MELK_HUMAN]] Note=Defects in MELK are associated with some cancers, such as brain or breast cancers. Expression is dramatically increased in aggressive undifferentiated tumors, correlating with poor patient outcome in breast and brain cancers, suggesting a role in tumor-initiating cells and proliferation via its function in cell proliferation regulation.
== Function ==
[[http://www.uniprot.org/uniprot/MELK_HUMAN MELK_HUMAN]] Serine/threonine-protein kinase involved in various processes such as cell cycle regulation, self-renewal of stem cells, apoptosis and splicing regulation. Has a broad substrate specificity; phosphorylates BCL2L14, CDC25B, MAP3K5/ASK1 and ZNF622. Acts as an activator of apoptosis by phosphorylating and activating MAP3K5/ASK1. Acts as a regulator of cell cycle, notably by mediating phosphorylation of CDC25B, promoting localization of CDC25B to the centrosome and the spindle poles during mitosis. Plays a key role in cell proliferation and carcinogenesis. Required for proliferation of embryonic and postnatal multipotent neural progenitors. Phosphorylates and inhibits BCL2L14, possibly leading to affect mammary carcinogenesis by mediating inhibition of the pro-apoptotic function of BCL2L14. Also involved in the inhibition of spliceosome assembly during mitosis by phosphorylating ZNF622, thereby contributing to its redirection to the nucleus. May also play a role in primitive hematopoiesis.<ref>PMID:11802789</ref> <ref>PMID:12400006</ref> <ref>PMID:14699119</ref> <ref>PMID:15908796</ref> <ref>PMID:16216881</ref> <ref>PMID:17280616</ref> 
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Non-specific serine/threonine protein kinase]]
[[Category: Beke, L.]]
[[Category: Berdini, V.]]
[[Category: Bonnet, P.]]
[[Category: Brehmer, D.]]
[[Category: Coyle, J E.]]
[[Category: Day, P J.]]
[[Category: Frederickson, M.]]
[[Category: Freyne, E J.E.]]
[[Category: Gilissen, R A.H J.]]
[[Category: Hamlett, C C.F.]]
[[Category: Howard, S.]]
[[Category: Johnson, C N.]]
[[Category: Linders, J T.M.]]
[[Category: McMenamin, R.]]
[[Category: Meerpoel, L.]]
[[Category: Patel, S.]]
[[Category: Rees, D C.]]
[[Category: Sharff, A.]]
[[Category: Sommen, F.]]
[[Category: Wu, T.]]
[[Category: Fragment sterbased drug design]]
[[Category: Kinase]]
[[Category: Transferase]]

Revision as of 10:47, 8 October 2014

Structure of MELK in complex with inhibitorsStructure of MELK in complex with inhibitors

Structural highlights

4d2p is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Activity:Non-specific serine/threonine protein kinase, with EC number 2.7.11.1
Resources:FirstGlance, OCA, RCSB, PDBsum

Disease

[MELK_HUMAN] Note=Defects in MELK are associated with some cancers, such as brain or breast cancers. Expression is dramatically increased in aggressive undifferentiated tumors, correlating with poor patient outcome in breast and brain cancers, suggesting a role in tumor-initiating cells and proliferation via its function in cell proliferation regulation.

Function

[MELK_HUMAN] Serine/threonine-protein kinase involved in various processes such as cell cycle regulation, self-renewal of stem cells, apoptosis and splicing regulation. Has a broad substrate specificity; phosphorylates BCL2L14, CDC25B, MAP3K5/ASK1 and ZNF622. Acts as an activator of apoptosis by phosphorylating and activating MAP3K5/ASK1. Acts as a regulator of cell cycle, notably by mediating phosphorylation of CDC25B, promoting localization of CDC25B to the centrosome and the spindle poles during mitosis. Plays a key role in cell proliferation and carcinogenesis. Required for proliferation of embryonic and postnatal multipotent neural progenitors. Phosphorylates and inhibits BCL2L14, possibly leading to affect mammary carcinogenesis by mediating inhibition of the pro-apoptotic function of BCL2L14. Also involved in the inhibition of spliceosome assembly during mitosis by phosphorylating ZNF622, thereby contributing to its redirection to the nucleus. May also play a role in primitive hematopoiesis.[1] [2] [3] [4] [5] [6]

References

  1. ↑ Seong HA, Gil M, Kim KT, Kim SJ, Ha H. Phosphorylation of a novel zinc-finger-like protein, ZPR9, by murine protein serine/threonine kinase 38 (MPK38). Biochem J. 2002 Feb 1;361(Pt 3):597-604. PMID:11802789
  2. ↑ Davezac N, Baldin V, Blot J, Ducommun B, Tassan JP. Human pEg3 kinase associates with and phosphorylates CDC25B phosphatase: a potential role for pEg3 in cell cycle regulation. Oncogene. 2002 Oct 31;21(50):7630-41. PMID:12400006 doi:10.1038/sj.onc.1205870
  3. ↑ Vulsteke V, Beullens M, Boudrez A, Keppens S, Van Eynde A, Rider MH, Stalmans W, Bollen M. Inhibition of spliceosome assembly by the cell cycle-regulated protein kinase MELK and involvement of splicing factor NIPP1. J Biol Chem. 2004 Mar 5;279(10):8642-7. Epub 2003 Dec 29. PMID:14699119 doi:10.1074/jbc.M311466200
  4. ↑ Mirey G, Chartrain I, Froment C, Quaranta M, Bouche JP, Monsarrat B, Tassan JP, Ducommun B. CDC25B phosphorylated by pEg3 localizes to the centrosome and the spindle poles at mitosis. Cell Cycle. 2005 Jun;4(6):806-11. Epub 2005 Jun 5. PMID:15908796
  5. ↑ Beullens M, Vancauwenbergh S, Morrice N, Derua R, Ceulemans H, Waelkens E, Bollen M. Substrate specificity and activity regulation of protein kinase MELK. J Biol Chem. 2005 Dec 2;280(48):40003-11. Epub 2005 Oct 10. PMID:16216881 doi:10.1074/jbc.M507274200
  6. ↑ Lin ML, Park JH, Nishidate T, Nakamura Y, Katagiri T. Involvement of maternal embryonic leucine zipper kinase (MELK) in mammary carcinogenesis through interaction with Bcl-G, a pro-apoptotic member of the Bcl-2 family. Breast Cancer Res. 2007;9(1):R17. PMID:17280616 doi:10.1186/bcr1650

4d2p, resolution 2.55Å

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