Purification and N-terminal sequence analysis of pea chloroplast protein synthesis factor EF-G.
Purification and N-terminal sequence analysis of pea chloroplast protein synthesis factor EF-G.
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豌豆叶绿体蛋白合成因子EF-G的纯化及N端序列分析。
DOI:
10.1006/abbi.1994.1016
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发表时间:
1994
影响因子:
3.9
通讯作者:
Breitenberger,CA
中科院分区:
文献类型:
--
作者:
Akkaya,MS;Welcsh,PL;Wolfe,MA;Duerr,BK;Becktel,WJ;Breitenberger,CA
Chloroplast protein synthesis elongation factor G (chlEF-G) has been purified from whole-cell extracts of light-induced pea (Pisum sativum) seedlings. The first step in the purification scheme relies on the affinity of organellar EF-G forEscherichia coliribosomes in the presence of the antibiotic, fusidic acid. A complex between organellar EF-G,E. coliribosomes, GDP, and fusidic acid was isolated by high-speed centrifugation. The largest major protein eluted from this complex by high salt has an apparent molecular weight of 86,000 and is only a minor component of similar preparations from dark-grown seedlings. The same polypeptide copurifies with EF-G activity upon size exclusion HPLC on a Waters Protein-Pak 200SW column. The N-terminal amino acid sequence of chlEF-G has been determined by direct sequencing of gel-purified protein. Like many proteins that are processed upon import into chloroplasts, it has an N-terminal alanine residue. Part of the putative chlEF-G gene has been amplified using oligonucleotides corresponding to the N-terminal amino acid sequence of the purified protein and to highly conserved sequences within the GTP-binding domains of other elongation factors. The deduced amino acid sequence displays high sequence identity to the corresponding region of the chloroplast EF-G gene product from soybean, somewhat less similarity to bacterial EF-Gs, and only low homology to mitochondrial EF-G and to eukaryotic cytoplasmic EF-2 genes. The chlEF-G gene appears to be encoded by a two-copy gene family in pea and a single-copy gene inArabidopsis thaliana.
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影响因子:
2.9
作者:
B. Salvato;A. Ghiretti;F. Ghiretti
通讯作者:
F. Ghiretti
影响因子:
2.9
作者:
B. Salvato;A. Ghiretti;F. Ghiretti
通讯作者:
F. Ghiretti
影响因子:
4.1
作者:
J. Tahon;D. Van Hoof;C. Vinckier;R. Witters;M. de Ley;R. Lontie
通讯作者:
R. Lontie
影响因子:
15
作者:
BROWN, JM;POWERS, L;SPIRO, TG
通讯作者:
SPIRO, TG
DOI:
10.1016/0305-0491(76)90301-1
发表时间:
1976
期刊:
Comparative biochemistry and physiology. B, Comparative biochemistry
影响因子:
--
作者:
A. Tamburro;B. Salvato;P. Zatta
通讯作者:
P. Zatta