The identification of the probable locus of iron and anion binding in the transferrins
The identification of the probable locus of iron and anion binding in the transferrins
复制标题
转铁蛋白中铁和阴离子结合的可能位点的鉴定
DOI:
10.1016/0968-0004(83)90078-6
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发表时间:
1983
影响因子:
13.8
通讯作者:
N. Chasteen
中科院分区:
文献类型:
--
作者:
N. Chasteen
Analysis of the transferrins (spectroscopic, chemical modification and sequence data) reveals the sites for iron (Ill) and carbonate binding are probably located near the junction of two peptide fragments joined by disulfide bridge 3 (Cys-117 to Cys-194) in the N-domain of human transferrin. Tyr-185, Tyr-188 and two of the three histidines, 119, 207 and 249, probably serve as ligands to the metal. It is very likely that Arg-124 (and~ or the duster Lys-115, Lys-116, His-119) is at the carbonate binding site which would enable the anion to coordinate to the iron as well. A similar arrangement of amino acids is present in the C-domain of the human protein and in both domains of ovotransferrin.The transferrins are an important class of iron-binding proteins widely distributed in the physiological fluids of vertebrates. These proteins include the iron transport protein serum transferrin, ovotransferrin from hen egg white and lactoferrin found in milk and other fluids. They have been the subject of intensive investigation for many years x, 2. All transferrins consist of a single polypeptide chain with one or two carbohydrate prosthetic groups; they have a mol. wt near 80 000, and reversibly bind two Fe s+ ions in separate but similar globular domains of the protein s-5. Iron binding to the protein requires the concomitant binding of carbonate or bicarbonate, the exact
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DOI:
10.1042/bj2010527
发表时间:
1982
期刊:
The Biochemical journal
影响因子:
--
作者:
Williams,J;Chasteen,ND;Moreton,K
通讯作者:
Moreton,K
影响因子:
2.9
作者:
Yeh,SM;Meares,CF
通讯作者:
Meares,CF
影响因子:
3.9
作者:
Alsaadi,BM;Williams,RJ;Woodworth,RC
通讯作者:
Woodworth,RC
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Shewale,JG;Brew,K
通讯作者:
Brew,K
影响因子:
2.9
作者:
Pecoraro,VL;Harris,WR;Carrano,CJ;Raymond,KN
通讯作者:
Raymond,KN