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首页> 外文期刊>Infection and immunity >Revised amino acid sequence for a heat-stable enterotoxin produced by an Escherichia coli strain (18D) that is pathogenic for humans.
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Revised amino acid sequence for a heat-stable enterotoxin produced by an Escherichia coli strain (18D) that is pathogenic for humans.

机译:由人类致病的大肠杆菌菌株(18D)产生的热稳定肠毒素的氨基酸序列经修订。

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The amino acid sequence of heat-stable enterotoxin produced by enterotoxigenic Escherichia coli 18D has been revised. Amino acids originally assigned to positions 11 and 18, i.e., Tyr and Asn, respectively, were found to occupy positions 18 and 11, respectively. Thus all heat-stable enterotoxins composed of 18 amino acids sequenced to date from human, porcine, and bovine isolates of E. coli have identical primary structures, i.e., Asn-Thr-Phe-Tyr-Cys-Cys-Glu-Leu-Cys-Cys-Asn-Pro-Ala-Cys-Ala-Gly-Cys-Tyr. Furthermore, all 18- and 19-amino-acid heat-stable enterotoxins from E. coli share an almost identical core sequence, i.e., 14 of the 15 carboxy-terminal amino acid residues are identical.
机译:由产肠毒素大肠杆菌18D产生的热稳定肠毒素的氨基酸序列已被修改。发现最初分配给位置11和18的氨基酸,即分别为Tyr和Asn,占据了位置18和11。因此,迄今从人,猪和牛的大肠杆菌分离物中测序的由18个氨基酸组成的所有热稳定肠毒素均具有相同的一级结构,即Asn-Thr-Phe-Tyr-Cys-Cys-Glu-Leu-Cys -Cys-Asn-Pro-Ala-Cys-Ala-Gly-Cys-Tyr。此外,来自大肠杆菌的所有18和19个氨基酸的热稳定肠毒素都具有几乎相同的核心序列,即15个羧基末端氨基酸残基中的14个是相同的。

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