An alternative methionine aminopeptidase, MAP-A, is required for nitrogen starvation and high-light acclimation in the cyanobacterium Synechocystis sp. PCC 6803.
An alternative methionine aminopeptidase, MAP-A, is required for nitrogen starvation and high-light acclimation in the cyanobacterium Synechocystis sp. PCC 6803.
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蓝藻集胞藻 PCC 6803 中的氮饥饿和高光驯化需要另一种蛋氨酸氨基肽酶 MAP-A
DOI:
10.1099/mic.0.026351-0
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发表时间:
2009
期刊:
影响因子:
1.5
通讯作者:
Karl Forchhammer
中科院分区:
文献类型:
--
作者:
Miriam Drath;Kerstin Baier;Karl Forchhammer
Methionine aminopeptidases (MetAPs or MAPs, encoded bymapgenes) are ubiquitous and pivotal enzymes for protein maturation in all living organisms. Whereas most bacteria harbour only onemapgene, many cyanobacterial genomes contain twomapparalogues, the genome ofSynechocystissp. PCC 6803 even three. The physiological function of multiplemapparalogues remains elusive so far. This communication reports for the first time differential MetAP function in a cyanobacterium. InSynechocystissp. PCC 6803, the universally conservedmapCgene (sll0555) is predominantly expressed in exponentially growing cells and appears to be a housekeeping gene. By contrast, expression ofmapA(slr0918) andmapB(slr0786) genes increases during stress conditions. ThemapBparalogue is only transiently expressed, whereas the widely distributedmapAgene appears to be the major MetAP during stress conditions. AmapA-deficientSynechocystismutant shows a subtle impairment of photosystem II properties even under non-stressed conditions. In particular, the binding site for the quinone QBis affected, indicating specific N-terminal methionine processing requirements of photosystem II components. MAP-A-specific processing becomes essential under certain stress conditions, since themapA-deficient mutant is severely impaired in surviving conditions of prolonged nitrogen starvation and high light exposure.
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影响因子:
2.9
作者:
Lowther, WT;Orville, AM;Matthews, BW
通讯作者:
Matthews, BW
影响因子:
3.2
作者:
BENBASSAT, A;BAUER, K;CHANG, S
通讯作者:
CHANG, S
影响因子:
3.7
作者:
Kern, J;Loll, B;Biesiadka, J
通讯作者:
Biesiadka, J
影响因子:
3.7
作者:
Cho,Christine;Chande,AroonT;Gakhar,Lokesh;Hunt,Jason;Ketterer,MargaretR;Apicella,MichaelA
通讯作者:
Apicella,MichaelA
DOI:
10.1093/dnares/3.3.185
发表时间:
1996-06-30
期刊:
DNA research : an international journal for rapid publication of reports on genes and genomes
影响因子:
--
作者:
Kaneko, T;Sato, S;Tabata, S
通讯作者:
Tabata, S