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Volumn 125, Issue 19, 2003, Pages 5584-5585

The biosynthesis of GDP-L-colitose: C-3 deoxygenation is catalyzed by a unique coenzyme B6-dependent enzyme

Author keywords

[No Author keywords available]

Indexed keywords

GUANOSINE DIPHOSPHATE; GUANOSINE DIPHOSPHATE LEVO COLITOSE; UNCLASSIFIED DRUG;

EID: 0037621444     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja030088r     Document Type: Article
Times cited : (20)

References (27)
  • 13
    • 0028818689 scopus 로고
    • The genes responsible for colitose biosynthesis in the Escherichia coli 0111 O-antigen have also been reported. The translated sequence of cold and that of its homologue in E. coli, wbdK, show excellent similarity (71% identity and 82% similarity) (Bastin, D. A.; Reeves, P. R. Gene 1995, 764, 17-23).
    • (1995) Gene , vol.164 , pp. 17-23
    • Bastin, D.A.1    Reeves, P.R.2
  • 15
    • 0037488267 scopus 로고    scopus 로고
    • note
    • r of 75.5 kDa estimated by gel filtration and a calculated mass of 44.5 kDa per monomer indicate that ColD exists as a homodimer in its native state.
  • 18
    • 0037488225 scopus 로고    scopus 로고
    • note
    • A typical assay mixture contained 1.8 mM GDP-mannose, 40 μM PLP, 2 mM L-glutamate, 1.5 μM ColB, and 0.65 μM ColD in 200 μL of 50 mM potassium phosphate buffer (pH 7.0). The incubation was conducted at 37 °C for 30 min. The resulting mixture was separated by HPLC on an Econosil C18 column (4.6 × 250 mm) which was eluted isocratically with 2% acetonitrile in 50 mM triethylammonium acetate buffer (pH 6.8). The flow rate was 1 mL/min, and the detector was set at 254 nm. Retention times of the substrate and products were as follows: GDP-mannose (2), 5.1 min; GDP-4-keto-6-deoxy-mannose (3), 6.2 min; GDP-4-keto- 3,6-dideoxymannose (4), 8.8 min.
  • 22
    • 0038163556 scopus 로고    scopus 로고
    • note
    • A large scale incubation contained 47.5 mM GDP-mannose, 1.5 mM PLP, 32.4 mM L-glutamate, 0.13 mM ColB, 3.46 μM ColD in 250 μL of 50 mM sodium phosphate buffer (pH 7.0). The incubation was conducted at 37 °C overnight. The proteins were removed by filtration through a microcon YM-10 membrane, and the filtrate was purified by HPLC using an Econosil C18 column (10 × 250 mm) as described above in ref 10. The pooled fractions containing product 4 were desalted using two consecutive Econo-Pac 10 DG (Bio-rad) columns, and product elution was achieved using water. The purified 4, after lyophilization, was stored at -80 °C.
  • 23
    • 0038502124 scopus 로고    scopus 로고
    • note
    • + 570.0639, found m/z 570.0636.
  • 24
    • 0038163555 scopus 로고    scopus 로고
    • note
    • -1, respectively.
  • 26
    • 0029090374 scopus 로고
    • (b) Hayashi, H. J. Biochem. 1995, 118, 463-473.
    • (1995) Biochem , vol.118 , pp. 463-473
    • Hayashi, H.J.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.