A COMMON MOTIF OF 2 ADJACENT PHOSPHOSERINES IN BOVINE, RABBIT AND HUMAN CARDIAC TROPONIN-I

被引:64
作者
MITTMANN, K [1 ]
JAQUET, K [1 ]
HEILMEYER, LMG [1 ]
机构
[1] RUHR UNIV BOCHUM,INST PHYSIOL CHEM,BIOCHEM SUPRAMOLEK SYST ABT,POSTFACH 102148,W-4630 BOCHUM,GERMANY
关键词
Cardiac troponin I; Human heart; N-terminal sequence; Phosphorylation site; Phosphoserine; Rabbit heart;
D O I
10.1016/0014-5793(90)81046-Q
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
From rabbit and human cardiac troponin I N-terminal mono and bisphosphorylated peptides were isolated which were obtained from Lys-C proteinase digests. Two adjacent phosphoserine residues could be localized in each phosphopeptide following further tryptic digestion. The previously published sequence of rabbit cardiac troponin I had to be corrected. Two adjacent phosphoserine residues are a common motif in the very similar sequences of bovine, rabbit and human cardiac troponin I. The N-terminal sequences are: AcADRSGGSTAG DTVPAPPPVR RRS(P)S(P) ANYRAY ATEPHAK (bovine), AcADESTDA-AG EARPAPAPVR RRSPSPANYRAY ATEPHAK (rabbit), (Ac,A,D/N,G,S,S,D/N,A,A,R) EPRPAPAPIR RRS(P)SP-NYRAY ATEPHAK (human). © 1990.
引用
收藏
页码:41 / 45
页数:5
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