共 33 条
CLONING AND SEQUENCING SHOW THAT 4-HYDROXYBENZOATE HYDROXYLASE (POBA) IS REQUIRED FOR UPTAKE OF 4-HYDROXYBENZOATE IN RHIZOBIUM-LEGUMINOSARUM
被引:23
作者:
WONG, CM
[1
]
DILWORTH, MJ
[1
]
GLENN, AR
[1
]
机构:
[1] MURDOCH UNIV, SCH BIOL & ENVIRONM SCI, NITROGEN FIXAT RES GRP, MURDOCH, WA 6150, AUSTRALIA
来源:
MICROBIOLOGY-SGM
|
1994年
/
140卷
关键词:
RHIZOBIUM LEGUMINOSARUM;
AROMATIC SUBSTRATE UPTAKE;
4-HYDROXYBENZOATE;
SEQUENCE OF POBA;
D O I:
10.1099/00221287-140-10-2775
中图分类号:
Q93 [微生物学];
学科分类号:
071005 ;
100705 ;
摘要:
Mutants of Rhizobium leguminosarum bv. viciae MNF300 and R. leguminosarum bv. trifolii WU95 unable to accumulate 4-hydroxybenzoate lack 4-hydroxybenzoate hydroxylase. The capacity of these mutants to take up and grow on 4-hydroxybenzoate was restored by a 2.0 kb EcoRI-PstI DNA fragment. This contained only one ORF which had over 60% DNA sequence similarity with the structural gene for 4-hydroxybenzoate hydroxylase (pobA) from Pseudomonas spp. and Acinetobacter. Reported effects of metabolic inhibitors and substrate analogues on the apparent uptake of 4-hydroxybenzoate have now been shown to be due to their direct effect on 4-hydroxybenzoate hydroxylase. We propose that uptake of 4-hydroxybenzoate is via a metabolic 'drag' mechanism dependent on the activity of the pobA gene product.
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页码:2775 / 2786
页数:12
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