Linked Life Data

11581250

Source:http://linkedlifedata.com/resource/pubmed/id/11581250

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
49
pubmed:dateCreated
2001-12-3
pubmed:databankReference
pubmed:abstractText
Phosphoglycolate phosphatase (PGPase), a key enzyme of photorespiration in photosynthetic organisms, was purified from Chlamydomonas reinhardtii. The enzyme was an approximately 65-kDa homodimer with a pI value of 5.1 composed of approximately 32-kDa subunits not connected by any S-S bridges. It was also highly specific for phosphoglycolate with a K(m) value of 140 microm and an optimal pH between 8 and 9. The activity was strongly inhibited by CaCl(2), and it recovered competitively following the addition of MgCl(2) or EGTA. A mobility shift was observed in SDS-polyacrylamide gel electrophoresis by the addition of CaCl(2), indicating that the enzyme binds to Ca(2+). The N-terminal region of amino acid sequence deduced from cDNA sequence that was not contained in the purified PGPase had similar characteristics to those of typical stroma-targeting transit peptides in C. reinhardtii. The following region of the deduced sequence containing 302 amino acid residues was similar to p-nitrophenylphosphatase-like proteins, although the purified PGPase did not hydrolyze p-nitrophenylphosphate. Genomic DNA fragments from wild type containing the sequence homologous to the cDNA for PGPase complemented the PGPase-deficient mutant pgp1. Possible regulatory mechanisms during adaptation to limiting CO(2) were discussed based on the characteristics of the purified PGPase and the deduced amino acid sequence.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
276
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
45573-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Characteristics and sequence of phosphoglycolate phosphatase from a eukaryotic green alga Chlamydomonas reinhardtii.
pubmed:affiliation
Plant Physiology Laboratory, Tohoku National Agricultural Research Center, Shimo-Kuriyagawa, Morioka 020-0198, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't