Molecular evolution of the transmembrane domains of G protein-coupled receptors.
Molecular evolution of the transmembrane domains of G protein-coupled receptors.
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DOI:
10.1371/journal.pone.0027813
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Chow CC
中科院分区:
文献类型:
--
作者:
Fatakia SN;Costanzi S;Chow CC
G protein-coupled receptors (GPCRs) are a superfamily of integral membrane proteins vital for signaling and are important targets for pharmaceutical intervention in humans. Previously, we identified a group of ten amino acid positions (called key positions), within the seven transmembrane domain (7TM) interhelical region, which had high mutual information with each other and many other positions in the 7TM. Here, we estimated the evolutionary selection pressure at those key positions. We found that the key positions of receptors for small molecule natural ligands were under strong negative selection. Receptors naturally activated by lipids had weaker negative selection in general when compared to small molecule-activated receptors. Selection pressure varied widely in peptide-activated receptors. We used this observation to predict that a subgroup of orphan GPCRs not under strong selection may not possess a natural small-molecule ligand. In the subgroup of MRGX1-type GPCRs, we identified a key position, along with two non-key positions, under statistically significant positive selection.
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影响因子:
14.9
作者:
UniProt Consortium
通讯作者:
UniProt Consortium
影响因子:
7
作者:
Choi, SS;Lahn, BT
通讯作者:
Lahn, BT
影响因子:
3.7
作者:
Fatakia, Sarosh N.;Costanzi, Stefano;Chow, Carson C.
通讯作者:
Chow, Carson C.
影响因子:
3.6
作者:
Fredriksson, R;Schiöth, HB
通讯作者:
Schiöth, HB
影响因子:
2.4
作者:
Ault, AD;Broach, JR
通讯作者:
Broach, JR