1vk1 is a 1 chain structure with sequence from Atcc 43587. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
BACKGROUND: The major bottleneck for determination of 3 D structures of proteins using X-rays is the production of diffraction quality crystals. Often proteins are subjected to chemical modification to improve the chances of crystallization RESULTS: Here, we report the successful crystallization of a nuclease employing a reductive methylation protocol. The key to crystallization was the successful introduction of 44 new cohesive (NZ) CH...O contacts (3.2-3.7 A) by the addition of 2 methyl groups to the side chain amine nitrogen (NZ) of 9 lysine residues of the nuclease. The new contacts dramatically altered the crystallization properties of the protein, resulting in crystals that diffracted to 1.2 A resolution. Analytical ultracentrifugation analysis and thermodynamics results revealed a more compact protein structure with better solvent exclusion of buried Trp residues in the folded state of the methylated protein, assisting crystallization. CONCLUSION: In this study, introduction of novel cohesive (NZ)CH...O contacts by reductive methylation resulted in the crystallization of a protein that had previously resisted crystallization in spite of extensive purification and crystallization space screening. Introduction of (NZ)CH...O contacts could provide a solution to crystallization problems for a broad range of protein targets.
(NZ)CH...O contacts assist crystallization of a ParB-like nuclease.,Shaw N, Cheng C, Tempel W, Chang J, Ng J, Wang XY, Perrett S, Rose J, Rao Z, Wang BC, Liu ZJ BMC Struct Biol. 2007 Jul 7;7:46. PMID:17617922[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑Shaw N, Cheng C, Tempel W, Chang J, Ng J, Wang XY, Perrett S, Rose J, Rao Z, Wang BC, Liu ZJ. (NZ)CH...O contacts assist crystallization of a ParB-like nuclease. BMC Struct Biol. 2007 Jul 7;7:46. PMID:17617922 doi:https://dx.doi.org/10.1186/1472-6807-7-46
