IDENTIFICATION OF NEW CYSTATHIONINE MONO-OXO ACIDS, S-(3-OXO-3-CARBOXY-N-PROPYL) CYSTEINE AND S-(2-OXO-2-CARBOXYETHYL) HOMOCYSTEINE, IN THE URINE OF A PATIENT WITH CYSTATHIONINURIA

被引:19
|
作者
OKADA, T
TAKECHI, T
WAKIGUCHI, H
KURASHIGE, T
SUGAHARA, K
KODAMA, H
机构
[1] KOCHI MED SCH,DEPT CHEM,NANKOKU,KOCHI 783,JAPAN
[2] KOCHI MED SCH,DEPT PEDIAT,NANKOKU,KOCHI 783,JAPAN
关键词
D O I
10.1006/abbi.1993.1436
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
Novel cystathionine mono-oxo acids, S-(3-oxo-3-carboxy-n-propyl) cysteine and S-(2-oxo-2-carboxyethyl) homocysteine, and cyclic amino acid, cystathionine ketimine, have been detected in the urine of a patient with cystathioninuria using liquid chromatography-mass spectrometry with an atmospheric pressure ionization interface system and an amino acid analyzer. To determine these cystathionine mono-oxo acids and cystathionine ketimine we took advantage of the selective absorbance at 380 nm of the phenylisothiocyanate-ketimine interaction product. The total concentrations of these compounds found in the urine samples of a cystathioninuric patient and six healthy subjects were respectively 3611.3 and 148.4 μg ± 35.9/g of creatinine. The cystathioninuric patient excreted 20 times more cystathionine mono-oxo acids in the urine than healthy subjects. © 1993 Academic Press, Inc.
引用
收藏
页码:385 / 391
页数:7
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