Functional control of the Candida albicans cell wall by catalytic protein kinase A subunit Tpk1.
Functional control of the Candida albicans cell wall by catalytic protein kinase A subunit Tpk1.
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通过催化蛋白激酶A亚基TPK1对白色念珠菌细胞壁的功能控制。
DOI:
10.1111/j.1365-2958.2012.08193.x
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发表时间:
2012-10
影响因子:
3.6
通讯作者:
Mitchell AP
中科院分区:
文献类型:
--
作者:
Fanning S;Xu W;Beaurepaire C;Suhan JP;Nantel A;Mitchell AP
The cyclic AMP-protein kinase A pathway governs numerous biological features of the fungal pathogen Candida albicans. The catalytic protein kinase A subunits, Tpk1 (orf19.4892) and Tpk2 (orf19.2277), have divergent roles, and most studies indicate a more pronounced role for Tpk2. Here we dissect two Tpk1-responsive properties: adherence and cell wall integrity. Homozygous tpk1/tpk1 mutants are hyperadherent, and a Tpk1 defect enables biofilm formation in the absence of Bcr1, a transcriptional regulator of biofilm adhesins. A quantitative gene expression-based assay reveals that tpk1/tpk1 and bcr1/bcr1 genotypes show mixed epistasis, as expected if Tpk1 and Bcr1 act mainly in distinct pathways. Overexpression of individual Tpk1-repressed genes indicates that cell surface proteins Als1, Als2, Als4, Csh1, and Csp37 contribute to Tpk1-regulated adherence. Tpk1 is also required for cell wall integrity, but has no role in the gene expression response to cell wall inhibition by caspofungin. Interestingly, increased expression of the adhesin gene ALS2 confers a cell wall defect, as manifested in hypersensitivity to the cell wall inhibitor caspofungin and a shallow cell wall structure. Our findings indicate that Tpk1 governs C. albicans cell wall properties through repression of select cell surface protein genes.
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影响因子:
6.7
作者:
Blankenship JR;Fanning S;Hamaker JJ;Mitchell AP
通讯作者:
Mitchell AP
影响因子:
3
作者:
Cloutier, M;Castilla, R;Cantore, ML
通讯作者:
Cantore, ML
影响因子:
--
作者:
Gregori, Christa;Glaser, Walter;Kuchler, Karl
通讯作者:
Kuchler, Karl
影响因子:
3.6
作者:
Leberer, E;Harcus, D;Schröppel, K
通讯作者:
Schröppel, K
影响因子:
--
作者:
Bimbó, A;Jia, YH;Liu, JH
通讯作者:
Liu, JH