Linked Life Data

14747148

Source:http://linkedlifedata.com/resource/pubmed/id/14747148

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-1-28
pubmed:databankReference
pubmed:abstractText
To study the occurrence and subcellular distribution of actin in trypanosomatid parasites, we have cloned and overexpressed Leishmania donovani actin gene in bacteria, purified the protein, and employed the affinity purified rabbit polyclonal anti-recombinant actin antibodies as a probe to study the organisation and subcellular distribution of actin in Leishmania cells. The Leishmania actin did not cross react with antimammalian actin antibodies but was readily recognized by the anti-Leishmania actin antibodies in both the promastigote and amastigote forms of the parasite. About 10(6) copies per cell of this protein (M(r) 42.05 kDa) were present in the Leishmania promastigote. Unlike other eukaryotic actins, the oligomeric forms of Leishmania actin were not stained by phalloidin nor were dissociated by actin filament-disrupting agents, like Latrunculin B and Cytochalasin D. Analysis of the primary structure of this protein revealed that these unusual characteristics may be related to the presence of highly diverged amino acids in the DNase I-binding loop (amino acids 40-50) and the hydrophobic plug (amino acids 262-272) regions of Leishmania actin. The subcellular distribution of actin was studied in the Leishmania promastigotes by employing immunoelectron and immunofluorescence microscopies. This protein was present not only in the flagella, flagellar pocket, nucleus and the kinetoplast but it was also localized on the nuclear, vacuolar and cytoplasmic face of the plasma membranes. Further, the plasma membrane-associated actin was colocalised with subpellicular microtubules, while most of the actin present in the kinetoplast colocalised with the k-DNA network. These results clearly indicate that Leishmania contains a novel form of actin which may structurally and functionally differ from other eukaryotic actins. The functional significance of these observations is discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0166-6851
pubmed:author
pubmed:issnType
Print
pubmed:volume
134
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
105-14
pubmed:dateRevised
2009-11-3
pubmed:meshHeading
pubmed-meshheading:14747148-Actins, pubmed-meshheading:14747148-Amino Acid Sequence, pubmed-meshheading:14747148-Animals, pubmed-meshheading:14747148-Bicyclo Compounds, Heterocyclic, pubmed-meshheading:14747148-Cloning, Molecular, pubmed-meshheading:14747148-Cytochalasin D, pubmed-meshheading:14747148-DNA, Protozoan, pubmed-meshheading:14747148-Leishmania, pubmed-meshheading:14747148-Microscopy, Fluorescence, pubmed-meshheading:14747148-Microscopy, Immunoelectron, pubmed-meshheading:14747148-Microtubules, pubmed-meshheading:14747148-Models, Molecular, pubmed-meshheading:14747148-Molecular Sequence Data, pubmed-meshheading:14747148-Molecular Weight, pubmed-meshheading:14747148-Organelles, pubmed-meshheading:14747148-Phalloidine, pubmed-meshheading:14747148-Protozoan Proteins, pubmed-meshheading:14747148-Recombinant Proteins, pubmed-meshheading:14747148-Sequence Alignment, pubmed-meshheading:14747148-Sequence Analysis, DNA, pubmed-meshheading:14747148-Staining and Labeling, pubmed-meshheading:14747148-Thiazoles, pubmed-meshheading:14747148-Thiazolidines
pubmed:year
2004
pubmed:articleTitle
A novel form of actin in Leishmania: molecular characterisation, subcellular localisation and association with subpellicular microtubules.
pubmed:affiliation
Division of Molecular and Structural Biology, Central Drug Research Institute, Lucknow 226 001, India.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't