We apologize for Proteopedia being slow to respond. For the past two years, a new implementation of Proteopedia has been being built. Soon, it will replace this 18-year old system. All existing content will be moved to the new system at a date that will be announced here.

3iq7

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 00:34, 25 December 2014

Crystal Structure of human Haspin in complex with 5-Iodotubercidin

Structural highlights

3iq7 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Gene:	GSG2 (Homo sapiens)
Activity:	Non-specific serine/threonine protein kinase, with EC number 2.7.11.1
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[HASP_HUMAN] Serine/threonine-protein kinase that phosphorylates histone H3 at 'Ser-3' (H3T3ph) during mitosis. This positions and activates AURKB and other components of the chromosomal passenger complex (CPC) at centromeres to ensure proper chromatid cohesion, metaphase alignment and normal progression through the cell cycle.^[1] ^[2] ^[3] ^[4] ^[5]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The protein kinase haspin/Gsg2 plays an important role in mitosis, where it specifically phosphorylates Thr-3 in histone H3 (H3T3). Its protein sequence is only weakly homologous to other protein kinases and lacks the highly conserved motifs normally required for kinase activity. Here we report structures of human haspin in complex with ATP and the inhibitor iodotubercidin. These structures reveal a constitutively active kinase conformation, stabilized by haspin-specific inserts. Haspin also has a highly atypical activation segment well adapted for specific recognition of the basic histone tail. Despite the lack of a DFG motif, ATP binding to haspin is similar to that in classical kinases; however, the ATP gamma-phosphate forms hydrogen bonds with the conserved catalytic loop residues Asp-649 and His-651, and a His651Ala haspin mutant is inactive, suggesting a direct role for the catalytic loop in ATP recognition. Enzyme kinetic data show that haspin phosphorylates substrate peptides through a rapid equilibrium random mechanism. A detailed analysis of histone modifications in the neighborhood of H3T3 reveals that increasing methylation at Lys-4 (H3K4) strongly decreases substrate recognition, suggesting a key role of H3K4 methylation in the regulation of haspin activity.

Structure and functional characterization of the atypical human kinase haspin.,Eswaran J, Patnaik D, Filippakopoulos P, Wang F, Stein RL, Murray JW, Higgins JM, Knapp S Proc Natl Acad Sci U S A. 2009 Dec 1;106(48):20198-203. Epub 2009 Nov 16. PMID:19918057^[6]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tanaka H, Iguchi N, Nakamura Y, Kohroki J, de Carvalho CE, Nishimune Y. Cloning and characterization of human haspin gene encoding haploid germ cell-specific nuclear protein kinase. Mol Hum Reprod. 2001 Mar;7(3):211-8. PMID:11228240
↑ Dai J, Sultan S, Taylor SS, Higgins JM. The kinase haspin is required for mitotic histone H3 Thr 3 phosphorylation and normal metaphase chromosome alignment. Genes Dev. 2005 Feb 15;19(4):472-88. Epub 2005 Jan 28. PMID:15681610 doi:gad.1267105
↑ Dai J, Sullivan BA, Higgins JM. Regulation of mitotic chromosome cohesion by Haspin and Aurora B. Dev Cell. 2006 Nov;11(5):741-50. PMID:17084365 doi:10.1016/j.devcel.2006.09.018
↑ Wang F, Dai J, Daum JR, Niedzialkowska E, Banerjee B, Stukenberg PT, Gorbsky GJ, Higgins JM. Histone H3 Thr-3 phosphorylation by Haspin positions Aurora B at centromeres in mitosis. Science. 2010 Oct 8;330(6001):231-5. doi: 10.1126/science.1189435. Epub 2010 Aug , 12. PMID:20705812 doi:10.1126/science.1189435
↑ Yamagishi Y, Honda T, Tanno Y, Watanabe Y. Two histone marks establish the inner centromere and chromosome bi-orientation. Science. 2010 Oct 8;330(6001):239-43. doi: 10.1126/science.1194498. PMID:20929775 doi:10.1126/science.1194498
↑ Eswaran J, Patnaik D, Filippakopoulos P, Wang F, Stein RL, Murray JW, Higgins JM, Knapp S. Structure and functional characterization of the atypical human kinase haspin. Proc Natl Acad Sci U S A. 2009 Dec 1;106(48):20198-203. Epub 2009 Nov 16. PMID:19918057 doi:10.1073/pnas.0901989106

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3iq7"

@@ Line 8: / Line 8: @@
 <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=3iq7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3iq7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3iq7 RCSB], [http://www.ebi.ac.uk/pdbsum/3iq7 PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/HASP_HUMAN HASP_HUMAN]] Serine/threonine-protein kinase that phosphorylates histone H3 at 'Ser-3' (H3T3ph) during mitosis. This positions and activates AURKB and other components of the chromosomal passenger complex (CPC) at centromeres to ensure proper chromatid cohesion, metaphase alignment and normal progression through the cell cycle.<ref>PMID:11228240</ref> <ref>PMID:15681610</ref> <ref>PMID:17084365</ref> <ref>PMID:20705812</ref> <ref>PMID:20929775</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

3iq7

From Proteopedia

Revision as of 00:34, 25 December 2014

Crystal Structure of human Haspin in complex with 5-Iodotubercidin

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox