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2obh
From Proteopedia
| 2obh, resolution 1.80Å () | |||||||||
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| Sites: | , , and | ||||||||
| Ligands: | |||||||||
| Non-Standard Residues: | |||||||||
| Gene: | CETN2, CALT, CEN2 (Homo sapiens) | ||||||||
| Related: | 2ggm, 2a4j | ||||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
Centrin-XPC peptide
Human centrin 2 (HsCen2), an EF-hand calcium binding protein, plays a regulatory role in the DNA damage recognition during the first steps of the nucleotide excision repair. This biological action is mediated by the binding to a short fragment (N847-R863) from the C-terminal region of xeroderma pigmentosum group C (XPC) protein. This work presents a detailed structural and energetic characterization of the HsCen2/XPC interaction. Using a truncated form of HsCen2 we obtained a high resolution (1.8 A) X-ray structure of the complex with the peptide N847-R863 from XPC. Structural and thermodynamic analysis of the interface revealed the existence of both electrostatic and apolar inter-molecular interactions, but the binding energy is mainly determined by the burial of apolar bulky side-chains into the hydrophobic pocket of the HsCen2 C-terminal domain. Binding studies with various peptide variants showed that XPC residues W848 and L851 constitute the critical anchoring side-chains. This enabled us to define a minimal centrin binding peptide variant of five residues, which accounts for about 75% of the total free energy of interaction between the two proteins. Immunofluorescence imaging in HeLa cells demonstrated that HsCen2 binding to the integral XPC protein may be observed in living cells, and is determined by the same interface residues identified in the X-ray structure of the complex. Overexpression of XPC perturbs the cellular distribution of HsCen2, by inducing a translocation of centrin molecules from the cytoplasm to the nucleus. The present data confirm that the in vitro structural features of the centrin/XPC peptide complex are highly relevant to the cellular context.
Structural, thermodynamic, and cellular characterization of human centrin 2 interaction with xeroderma pigmentosum group C protein., Charbonnier JB, Renaud E, Miron S, Le Du MH, Blouquit Y, Duchambon P, Christova P, Shosheva A, Rose T, Angulo JF, Craescu CT, J Mol Biol. 2007 Nov 2;373(4):1032-46. Epub 2007 Aug 25. PMID:17897675
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
2obh is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
- Charbonnier JB, Renaud E, Miron S, Le Du MH, Blouquit Y, Duchambon P, Christova P, Shosheva A, Rose T, Angulo JF, Craescu CT. Structural, thermodynamic, and cellular characterization of human centrin 2 interaction with xeroderma pigmentosum group C protein. J Mol Biol. 2007 Nov 2;373(4):1032-46. Epub 2007 Aug 25. PMID:17897675 doi:10.1016/j.jmb.2007.08.046
- Charbonnier JB, Christova P, Shosheva A, Stura E, Le Du MH, Blouquit Y, Duchambon P, Miron S, Craescu CT. Crystallization and preliminary X-ray diffraction data of the complex between human centrin 2 and a peptide from the protein XPC. Acta Crystallogr Sect F Struct Biol Cryst Commun. 2006 Jul 1;62(Pt, 7):649-51. Epub 2006 Jun 10. PMID:16820684 doi:10.1107/S1744309106019415
- Thompson JR, Ryan ZC, Salisbury JL, Kumar R. The structure of the human centrin 2-xeroderma pigmentosum group C protein complex. J Biol Chem. 2006 Jul 7;281(27):18746-52. Epub 2006 Apr 20. PMID:16627479 doi:10.1074/jbc.M513667200
