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Title: A functional role of Rv1738 in Mycobacterium tuberculosis persistence suggested by racemic protein crystallography

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Racemic protein crystallography was used to determine the X-ray structure of the predicted Mycobacterium tuberculosis protein Rv1738, which had been completely recalcitrant to crystallization in its natural L-form. Native chemical ligation was used to synthesize both L-protein and D-protein enantiomers of Rv1738. Crystallization of the racemic {D-protein + L-protein} mixture was immediately successful. The resulting crystals diffracted to high resolution and also enabled facile structure determination because of the quantized phases of the data from centrosymmetric crystals. The X-ray structure of Rv1738 revealed striking similarity with bacterial hibernation factors, despite minimal sequence similarity. As a result, we predict that Rv1738, which is highly up-regulated in conditions that mimic the onset of persistence, helps trigger dormancy by association with the bacterial ribosome.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1178127
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 112, Issue 14; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (5)

Novel protein science enabled by total chemical synthesis journal December 2018
Traceless β-mercaptan-assisted activation of valinyl benzimidazolinones in peptide ligations journal January 2018
Regulation of Three Virulence Strategies of Mycobacterium tuberculosis: A Success Story journal January 2018
Mycobacterial Dormancy Systems and Host Responses in Tuberculosis journal February 2017
Racemic crystal structures of peptide toxins, GsMTx4 prepared by protein total synthesis journal July 2018