Cotranslational Folding of Globin*
Cotranslational Folding of Globin*
复制标题
球蛋白的共翻译折叠*
DOI:
--
复制
发表时间:
1997
影响因子:
4.8
通讯作者:
A. Spirin
中科院分区:
文献类型:
--
作者:
A. Komar;A. Kommer;I. Krasheninnikov;A. Spirin
Globin synthesis in a wheat germ cell-free translation system was performed in the presence of [3H]hemin and [35S]methionine to determine the minimal length of the nascent ribosome-bound globin chain capable of heme binding. Nascent polypeptides of predetermined size were synthesized on ribosomes by translation of truncated mRNA molecules. Analysis with the use of sucrose gradient centrifugation and puromycin reaction revealed that the ribosome-bound N-terminal α-globin fragments of 140, 100, and 86 amino acid residues are capable of an efficient heme binding, whereas those of 75, 65, and 34 amino acid residues display a significantly weaker, or just nonspecific, affinity to heme. This indicates that the ribosome-bound nascent chain of 86 amino acid residues has already acquired a spatial structure that allows its interaction with the heme group or that heme attachment promotes the formation of the proper tertiary structure in the ribosome-bound nascent peptide. In any case the cotranslational folding of globin is suggested.
DOI:
10.1073/pnas.92.14.6229
发表时间:
1995-07-03
影响因子:
11.1
作者:
CHEN, W;HELENIUS, J;HELENIUS, A
通讯作者:
HELENIUS, A
DOI:
--
发表时间:
1996
期刊:
RNA (New York, N.Y.)
影响因子:
--
作者:
Lapham,J;Crothers,DM
通讯作者:
Crothers,DM