Dormant spores sense amino acids through the B subunits of their germination receptors.
Dormant spores sense amino acids through the B subunits of their germination receptors.
复制标题
DOI:
10.1038/s41467-021-27235-2
复制
发表时间:
2021-11-25
影响因子:
16.6
通讯作者:
Rudner DZ
中科院分区:
文献类型:
--
作者:
Artzi L;Alon A;Brock KP;Green AG;Tam A;Ramírez-Guadiana FH;Marks D;Kruse A;Rudner DZ
Bacteria from the orders Bacillales and Clostridiales differentiate into stress-resistant spores that can remain dormant for years, yet rapidly germinate upon nutrient sensing. How spores monitor nutrients is poorly understood but in most cases requires putative membrane receptors. The prototypical receptor from Bacillus subtilis consists of three proteins (GerAA, GerAB, GerAC) required for germination in response to L-alanine. GerAB belongs to the Amino Acid-Polyamine-Organocation superfamily of transporters. Using evolutionary co-variation analysis, we provide evidence that GerAB adopts a structure similar to an L-alanine transporter from this superfamily. We show that mutations in gerAB predicted to disrupt the ligand-binding pocket impair germination, while mutations predicted to function in L-alanine recognition enable spores to respond to L-leucine or L-serine. Finally, substitutions of bulkier residues at these positions cause constitutive germination. These data suggest that GerAB is the L-alanine sensor and that B subunits in this broadly conserved family function in nutrient detection. Germination of Bacillus subtilis spores in response to L-alanine requires a putative membrane receptor consisting of three proteins. Here, Artzi et al. use evolutionary co-variation analysis and functional assays of mutants to provide evidence that one of the proteins, GerAB, likely acts as the L-alanine sensor.
登录
查看更多内容
影响因子:
16.6
作者:
Green AG;Elhabashy H;Brock KP;Maddamsetti R;Kohlbacher O;Marks DS
通讯作者:
Marks DS
影响因子:
64.5
作者:
Hopf TA;Colwell LJ;Sheridan R;Rost B;Sander C;Marks DS
通讯作者:
Marks DS
影响因子:
3.6
作者:
Carr, Katherine A.;Lybarger, Suzanne R.;Hanna, Philip C.
通讯作者:
Hanna, Philip C.
影响因子:
3.2
作者:
Aspholm, Marina;Borch-Pedersen, Kristina;Lindback, Toril
通讯作者:
Lindback, Toril
DOI:
10.1073/pnas.1903675116
发表时间:
2019-06-04
影响因子:
11.1
作者:
Li, Yunfeng;Jin, Kai;Hao, Bing
通讯作者:
Hao, Bing