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pubmed-article:18182029 a pubmed:Citation ;
lifeskim:mentions umls-concept:C0162741 , umls-concept:C1514559 , umls-concept:C0023175 , umls-concept:C0057738 , umls-concept:C1704410 , umls-concept:C2349975 ;
pubmed:issue "1" ;
pubmed:dateCreated "2008-3-20" ;
pubmed:abstractText "In Arabidopsis thaliana, a family of six genes encodes acyl-CoA-binding proteins (ACBPs) that show conservation at the acyl-CoA-binding domain. They are the membrane-associated ACBP1 and ACBP2, extracellularly targeted ACBP3, kelch-motif-containing ACBP4 and ACBP5, and 10-kDa ACBP6. The acyl-CoA domain in each of ACBP1 to ACBP6 binds long-chain acyl-CoA esters in vitro, suggestive of possible roles in plant lipid metabolism. We addressed here the use of Arabidopsis ACBPs in conferring lead [Pb(II)] tolerance in transgenic plants because the 10-kDa human ACBP has been identified as a molecular target for Pb(II) in vivo. We investigated the effect of Pb(II) stress on the expression of genes encoding Arabidopsis ACBP1, ACBP2 and ACBP6. We showed that the expression of ACBP1 and ACBP2, but not ACBP6, in root is induced by Pb(II) nitrate treatment. In vitro Pb(II)-binding assays indicated that ACBP1 binds Pb(II) comparatively better, and ACBP1 was therefore selected for further investigations. When grown on Pb(II)-containing medium, transgenic Arabidopsis lines overexpressing ACBP1 were more tolerant to Pb(II)-induced stress than the wild type. Accumulation of Pb(II) in shoots of the ACBP1-overepxressing plants was significantly higher than wild type. The acbp1 mutant showed enhanced sensitivity to Pb(II) when germinated and grown in the presence of Pb(II) nitrate and tolerance was restored upon complementation using an ACBP1 cDNA. Our results suggest that ACBP1 is involved in mediating Pb(II) tolerance in Arabidopsis with accumulation of Pb(II) in shoots. Such observations of Pb(II) accumulation, rather than Pb(II) extrusion, in the ACBP1-overexpressing plants implicate possible use of ACBP1 in Pb(II) phytoremediation." ;
pubmed:language "eng" ;
pubmed:journal ;
pubmed:citationSubset "IM" ;
pubmed:chemical , , , , , ;
pubmed:status "MEDLINE" ;
pubmed:month "Apr" ;
pubmed:issn "1365-313X" ;
pubmed:author pubmed-author:GaoWeiW , pubmed-author:ChyeMee-LenML , pubmed-author:XiaoShiS , pubmed-author:RamalingamSathishkumarS , pubmed-author:ChenQin-FangQF ;
pubmed:issnType "Electronic" ;
pubmed:volume "54" ;
pubmed:owner "NLM" ;
pubmed:authorsComplete "Y" ;
pubmed:pagination "141-51" ;
pubmed:meshHeading pubmed-meshheading:18182029-Lead , pubmed-meshheading:18182029-Seeds , , pubmed-meshheading:18182029-Germination , , , pubmed-meshheading:18182029-Arabidopsis , , , , , ;
pubmed:year "2008" ;
pubmed:articleTitle "Overexpression of membrane-associated acyl-CoA-binding protein ACBP1 enhances lead tolerance in Arabidopsis." ;
pubmed:affiliation "School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China." ;
pubmed:publicationType "Journal Article" , "Research Support, Non-U.S. Gov't" .