Linked Life Data

19995727

Source:http://linkedlifedata.com/resource/pubmed/id/19995727

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2009-12-9
pubmed:abstractText
The chloroplasts genome (plastome) occurs at high copy numbers per cell. Several chloroplast genome copies are densely packed into nucleoprotein particles called nucleoids. How genome packaging occurs and which proteins organize chloroplast nucleoids are largely unknown. Here, we have analyzed the Chlamydomonas reinhardtii homolog of the bacterial architectural DNA-binding protein HU, the histone-like protein HLP. We show that the Chlamydomonas HLP protein is targeted to chloroplasts and associates with nucleoids. Knockdown of HLP gene expression by RNA interference (RNAi) alters the structure of chloroplast nucleoids and appears to reduce the level of compaction of chloroplast DNA. Unexpectedly, also chloroplast genome copy numbers are significantly decreased in the RNAi strains, suggesting that, in addition to its architectural role in nucleoid formation, the HLP protein is also involved in chloroplast genome maintenance.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1674-2052
pubmed:author
pubmed:issnType
Print
pubmed:volume
2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1223-32
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
The Chlamydomonas chloroplast HLP protein is required for nucleoid organization and genome maintenance.
pubmed:affiliation
Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam-Golm, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't