Confirmation by mass spectrometry of a trisulfide variant in methionyl human growth hormone biosynthesized in Escherichia coli

被引:32
作者
CanovaDavis, E
Baldonado, IP
Chloupek, RC
Ling, VT
Gehant, R
Olson, K
GilleceCastro, BL
机构
[1] GENENTECH INC,DEPT PROC SCI,S SAN FRANCISCO,CA 94080
[2] GENENTECH INC,DEPT PROT CHEM,S SAN FRANCISCO,CA 94080
关键词
D O I
10.1021/ac9605915
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A sulfur-containing compound found in acid hydrolysates of proteins was identified 30 years ago as a trisulfide: bis-(2-amino-2-carboxyethyl) trisulfide (cysteine(2)S(3)). At that time, studies concerning the chemistry of sulfur-transferring enzyme systems suggested that cysteine(2)S(3) also existed in biological systems, Two decades later, a cystine trisulfide structure was postulated in the regulator protein molecule for the activation of delta-aminolevulinate synthetase, Recently, a trisulfide bond was reported to occur in the minor loop disulfide at Cys(182)-Cys(189) in human growth hormone, Wet have detected a trisulfide structure in methionyl human growth hormone iu the major loop disulfide Cys(53)-Cys(165). The development of mass spectral analyses of high molecular weight molecules, such as proteins, led to the eventual identification of the modification, A tandem mass spectral analysis on a Sciex electrospray instrument localized an addition of 32 Da to the Cys(53)-Cys(165) fragment, Elemental composition was determined by accurate mass measurement obtained by peak matching to a synthetic peptide and established that an extra sulfur atom was involved.
引用
收藏
页码:4044 / 4051
页数:8
相关论文
共 47 条
[1]  
Andersson C, 1996, INT J PEPT PROT RES, V47, P311
[2]   The amino-acid methionine; Constitution and synthesis. [J].
Barger, G ;
Coyne, FP .
BIOCHEMICAL JOURNAL, 1928, 22 (06) :1417-1425
[3]   CHARACTERIZATION OF DISULFIDE BOND POSITION IN PROTEINS AND SEQUENCE-ANALYSIS OF CYSTINE-BRIDGED PEPTIDES BY TANDEM MASS-SPECTROMETRY [J].
BEAN, MF ;
CARR, SA .
ANALYTICAL BIOCHEMISTRY, 1992, 201 (02) :216-226
[4]   OPTICAL-ACTIVITY OF DISULFIDE BONDS IN PROTEINS .1. STUDIES ON PLASMIN MODIFIED HUMAN SOMATOTROPIN [J].
BEWLEY, TA .
BIOCHEMISTRY, 1977, 16 (02) :209-215
[5]   CIRCULAR DICHROSIM OF BIOLOGICAL MACROMOLECULES [J].
BEYCHOK, S .
SCIENCE, 1966, 154 (3754) :1288-&
[6]  
BOGOSIAN G, 1991, BIOCHIMIE, V73, P546
[7]  
BRANZOLI U, 1974, J BIOL CHEM, V249, P4346
[8]  
CASNATI G, 1967, CHIM IND-MILAN, V49, P57
[9]  
CATSIMPOOLAS N, 1964, J BIOL CHEM, V239, P4132
[10]  
CAVALLINI D., 1960, ENZYMOLOGIA, V22, P161