Abstract:
:Bacillus megaterium mutants JV-9 and JV-10 are temperature sensitive for initiation of spore germination. At 46 C, they did not lose heat resistance, dipicolinic acid, or absorbance, indicating that the temperature-sensitive blocks are very early in the sequence of initiation reactions. Strain JV-9 was temperature sensitive for initiation by glucose alone, and strain JV-10 was temperature sensitive for initiation by glucose, L-leucine, L-proline, KBr, or calcium dipicolinate. The kinetics of initiation were followed after two kinds of temperature change (shift-up and shift-down) experiments. Mutant spores incubated for different times at 46 C and then shifted down to 30 C showed no significant differences in the rates of absorbance decrease, i.e., no stimulation or inhibition. Conversely, when mutant spores were incubated for different times at 30 C, a fraction of the population initiated germination, and after shift-up to 46 C an additional fraction continued initiation while a third fraction stopped. This latter fraction did initiate germination when the temperature was lowered to 30 C. The kinetics of initiation after shift-up and shift-down in temperature suggest that the early events in initiation reagents, whereas the other four initiated sensitivity for all of the above initiation reagents, whereas the other four initiated very poorly. It was suggested that the lesion in strain JV-10 may result in the formation of one temperature-sensitive protein. Revertants of strain JV-9 could not be isolated.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Vary JCdoi
10.1128/JB.121.1.197-203.1975subject
Has Abstractpub_date
1975-01-01 00:00:00pages
197-203issue
1eissn
0021-9193issn
1098-5530journal_volume
121pub_type
杂志文章abstract::HypA and HypB are maturation proteins required for incorporation of nickel into the hydrogenase large subunit. To examine the functions of these proteins in nickel insertion, the hybF gene, which is a homolog of hypA essential for maturation of hydrogenases 1 and 2 from Escherichia coli, was overexpressed, and the pro...
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更新日期:2004-05-01 00:00:00
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journal_title:Journal of bacteriology
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doi:10.1128/JB.163.2.648-653.1985
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更新日期:1990-10-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.118.1.202-208.1974
更新日期:1974-04-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.164.2.802-810.1985
更新日期:1985-11-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.175.4.966-972.1993
更新日期:1993-02-01 00:00:00
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journal_title:Journal of bacteriology
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更新日期:1998-09-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.95.1.74-80.1968
更新日期:1968-01-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.175.19.6276-6286.1993
更新日期:1993-10-01 00:00:00
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journal_title:Journal of bacteriology
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更新日期:1967-11-01 00:00:00
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journal_title:Journal of bacteriology
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更新日期:1996-04-01 00:00:00
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journal_title:Journal of bacteriology
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doi:10.1128/JB.147.3.1105-1109.1981
更新日期:1981-09-01 00:00:00
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journal_title:Journal of bacteriology
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doi:10.1128/JB.132.2.641-649.1977
更新日期:1977-11-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:1995-06-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/jb.179.7.2331-2338.1997
更新日期:1997-04-01 00:00:00
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journal_title:Journal of bacteriology
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更新日期:2007-04-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:1998-07-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:2013-08-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.170.2.583-587.1988
更新日期:1988-02-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.173.8.2481-2487.1991
更新日期:1991-04-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.126.1.553-555.1976
更新日期:1976-04-01 00:00:00