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Mycobacterium tuberculosis Rv2536 protein implicated in specific binding to human cell lines

Protein Science, ISSN: 0961-8368, Vol: 14, Issue: 9, Page: 2236-2245
2005
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Article Description

The gene encoding the Mycobacterium tuberculosis Rv2536 protein is present in the Mycobacterium tuberculosis complex (as assayed by PCR) and transcribed (as determined by RT-PCR) in M. tuberculosis H37Rv, M. tuberculosis H37Ra, M. bovis BCG, and M. africanum strains. Rabbits immunized with synthetic polymer peptides from this protein produced antibodies specifically recognizing a 25-kDa band in mycobacterial sonicate. U937 and A549 cells were used in binding assays involving 20-amino-acid-long synthetic peptides covering the whole Rv2536 protein sequence. Peptide 11207 (DVFSAVRADDSPTGEMQVAQY ) presented high specific binding to both types of cells; the binding was saturable and presented nanomolar affinity constants. Cross-linking assays revealed that this peptide specifically binds to 50 kDa U937 cell membrane and 45 kDa A549 cell membrane proteins. Copyright © 2005 The Protein Society.

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