Document Detail

Single-spore elemental analyses indicate that dipicolinic acid-deficient Bacillus subtilis spores fail to accumulate calcium.
MedLine Citation:
PMID:  20396869     Owner:  NLM     Status:  MEDLINE    
Dipicolinic acid (pyridine-2,6-carboxylic acid; DPA) is a major component of bacterial spores and has been shown to be an important determinant of spore resistance. In the core of dormant Bacillus subtilis spores, DPA is associated with divalent calcium in a 1:1 chelate (Ca-DPA). Spores excrete Ca-DPA during germination, but it is unknown whether Ca and DPA are imported separately or together into the developing spore. Elemental analysis by scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS) of wild-type spores and mutant spores lacking the ability to synthesize DPA showed that DPA-less spores also lacked calcium, suggesting that the two compounds may be co-imported.
Paul E Hintze; Wayne L Nicholson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-04-16
Journal Detail:
Title:  Archives of microbiology     Volume:  192     ISSN:  1432-072X     ISO Abbreviation:  Arch. Microbiol.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-18     Completed Date:  2010-07-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0410427     Medline TA:  Arch Microbiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  493-7     Citation Subset:  IM    
NASA Corrosion Technology Laboratory, Kennedy Space Center, Gainesville, FL 32899, USA.
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MeSH Terms
Bacillus subtilis / chemistry*,  metabolism,  ultrastructure
Calcium / analysis*,  metabolism
Microscopy, Electron, Scanning
Picolinic Acids / analysis*,  metabolism
Spectrometry, X-Ray Emission
Spores, Bacterial / chemistry,  ultrastructure
Reg. No./Substance:
0/Picolinic Acids; 499-83-2/dipicolinic acid; 7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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