当前位置： SCI文献检索 > MICROBIOLOGICAL RESEARCH期刊下所有文献 > Identification of two vicinal operons for the degradation of 2-aminobenzenesulfonate encoded on plasmid pSAH in Alcaligenes sp. strain O-1.

Identification of two vicinal operons for the degradation of 2-aminobenzenesulfonate encoded on plasmid pSAH in Alcaligenes sp. strain O-1.

Abstract：

:Alcaligenes sp. strain O-1 inducibly deaminates 2-aminobenzenesulfonate (ABS) via dioxygenation to 3-sulfocatechol, which is desulfonated during meta ring-cleavage to yield 2-hydroxymuconate. This intermediate is transformed through the oxalocrotonate-branch of the sulfocatechol meta-pathway (Scm). The complete pathway is encoded on the 180-kb plasmid pSAH, 20kb of which was sequenced. Twenty open reading frames (ORFs) were detected. Two clusters (abs and scm) with degradative genes were surrounded by several transposon-related ORFs. The six genes of the abs cluster were shown to be co-transcribed, and contained the genes for two characterised subunits of the oxygenase component of the ABS-dioxygenase system, and genes putatively encoding ABS-transport functions with similarities to (a) an ABC-type transporter system and (b) a putative major facilitator superfamily transporter. No gene encoding the reductase for the oxygenase system was present in the abs gene cluster, but a candidate gene was found in the scm cluster. The seven-gene scm cluster was also transcribed as single polycistronic message. Functions could be attributed to the gene products, but one enzyme, which was shown to be present, 2-hydroxymuconate isomerase, was not encoded in the scm cluster. No transcriptional regulator was found. This genetic information on the degradation of ABS in strain O-1 provides another example of both split operons and dispersed pathway genes.

journal_name

Microbiol Res

journal_title

Microbiological research

authors

Ruff J,Smits TH,Cook AM,Schleheck D

doi

10.1016/j.micres.2009.05.006

subject

Has Abstract

pub_date

2010-05-30 00:00:00

pages

288-99

issue

4

eissn

0944-5013

issn

1618-0623

pii

S0944-5013(09)00043-3

journal_volume

165

pub_type

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