Pathogenic α1-Antitrypsin Polymers Are Formed by Reactive Loop-β-Sheet A Linkage*
Pathogenic α1-Antitrypsin Polymers Are Formed by Reactive Loop-β-Sheet A Linkage*
复制标题
致病性 α1-抗胰蛋白酶聚合物由反应性环-β-片 A 连接形成*
DOI:
--
复制
发表时间:
2000
影响因子:
4.8
通讯作者:
D. Lomas
中科院分区:
文献类型:
--
作者:
P. Sivasothy;T. Dafforn;P. Gettins;D. Lomas
α1-Antitrypsin is the most abundant circulating protease inhibitor and the archetype of the serine protease inhibitor or serpin superfamily. Members of this family may be inactivated by point mutations that favor transition to a polymeric conformation. This polymeric conformation underlies diseases as diverse as α1-antitrypsin deficiency-related cirrhosis, thrombosis, angio-edema, and dementia. The precise structural linkage within a polymer has been the subject of much debate with evidence for reactive loop insertion into β-sheet A or C or as strand 7A. We have used site directed cysteine mutants and fluorescence resonance energy transfer (FRET) to measure a number of distances between monomeric units in polymeric α1-antitrypsin. We have then used a combinatorial approach to compare distances determined from FRET with distances obtained from 2.9 × 106 different possible orientations of the α1-antitrypsin polymer. The closest matches between experimental FRET measurements and theoretical structures show conclusively that polymers of α1-antitrypsin form by insertion of the reactive loop into β-sheet A.
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Aulak,KS;Eldering,E;Hack,CE;Lubbers,YP;Harrison,RA;Mast,A;Cicardi,M;Davis3rd,AE
通讯作者:
Davis3rd,AE
DOI:
10.1073/pnas.96.9.4808
发表时间:
1999-04
影响因子:
11.1
作者:
E. Stratikos;P. Gettins
通讯作者:
E. Stratikos;P. Gettins
DOI:
10.1021/bi960233w
发表时间:
1996
期刊:
Biochemistry.
影响因子:
--
作者:
Plotnick,MI;Mayne,L;Schechter,NM;Rubin,H
通讯作者:
Rubin,H