Crystal structure of (L-Arg)-B0 bovine insulin at 0.21 nm resolution.
The crystal structure of (L-Arg)-B0 bovine insulin has been determined, using data to 0.21 nm and atomic parameters of 2Zn porcine insulin as a starting model, by the difference. Fourier method, the restrained least square method and X-PLOR package, interspersed with careful review of the electron density, to a final R-factor of 0.182 and r.m.s. deviation of 0.002 2 nm for the bond lengths and 4.3 degrees for the bond angles. The electron densities of additional (L-Arg)-B0 residues to B-chain N-terminus of two monomers in each asymmetric unit are very clear. The crystallographic micro-environment of the N-terminus of the B-chain is different from that of rhombohedral 2-zinc insulin.
Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.
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Ye
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Wan
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Liu
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Chang
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Liang
D003460:Crystallization; D018360:Crystallography, X-Ray; D007328:Insulin / Q000031:analogs & derivatives* / Q000737:chemistry
D007328:Insulin; C115359:insulin, Arg(B0)-