1H NMR sequential resonance assignments, secondary structure, and global fold in solution of the major (trans-Pro43) form of bovine calbindin D9k.
1H NMR sequential resonance assignments, secondary structure, and global fold in solution of the major (trans-Pro43) form of bovine calbindin D9k.
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牛钙结合蛋白 D9k 主要(反式 Pro43)形式溶液中的 1 H NMR 连续共振归属、二级结构和整体折叠。
DOI:
10.1021/bi00443a043
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发表时间:
1989
期刊:
影响因子:
2.9
通讯作者:
Chazin,WJ
中科院分区:
文献类型:
--
作者:
Kördel,J;Forsén,S;Chazin,WJ
A wide range of two-dimensional'Hnmr experiments have been used to completely assign the 500-MHz'H NMR spectrum of recombinant Ca2+-saturated bovine calbindin D9k (76 amino acids, Mr= 8500). In solution, calbindin D9k exists as an equilibrium mixture of isoforms with trans (75%) and cis (25%) isomers of the peptide bond at Pro43 [Chazin et al.(1989) Proc. Natl. Acad. Sci. USA 86, 2195-2198], whichresults in two sets of* H NMR signals from approximately half of the amino acids. The complete'H NMR assignments for the major, trans-Pro43 isoform are presented here. By use of an integrated strategy for spin system identification, 62 of the 76 spin systems could be assigned to the appropriate residue type. Sequence-specific assignments were then obtained by the standard method. Secondary structure elements were identified on the basis of networks of sequential and medium-range nuclear Overhauser effects (NOEs), VHNa sPin coupling constants, and the location of slowly exchanging amide protons. Four helical segments and a short/3-sheet between the twocalcium binding loops are found. These elements of secondary structure and a few additional long-range NOEs providethe global fold. Good agreement is found between the solution and crystal structures of the minor A form of bovine calbindin D9k and between the solution structures of the minor A form of bovine calbindinThe Ca2+ ion plays an important role in the regulation of a wide variety of cellular functions (Rasmussen, 1986a, b). Over the past decade the ion has come to be regarded as a new kind of second messenger—or perhaps better, a “third messenger” if the intermediary action of inositol tri-or tetraphosphates is taken into consideration (Berridge, 1987). In the resting cell the Ca2+ concentration is generally found to be very low,
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影响因子:
2.9
作者:
Drakenberg,T;Hofmann,T;Chazin,WJ
通讯作者:
Chazin,WJ
影响因子:
3.9
作者:
A. Hitchman;M. Kerr;J. Harrison
通讯作者:
J. Harrison
影响因子:
3.5
作者:
M. Ikura;O. Minowa;M. Yazawa;K. Yagi;K. Hikichi
通讯作者:
K. Hikichi
DOI:
10.1111/j.1432-1033.1983.tb07857.x
发表时间:
1983
期刊:
European journal of biochemistry
影响因子:
--
作者:
D. Dalgarno;B. Levine;R. J. Williams;C. Fullmer;R. Wasserman
通讯作者:
R. Wasserman
影响因子:
64.8
作者:
LINSE, S;BRODIN, P;FORSEN, S
通讯作者:
FORSEN, S