Unknown

Dataset Information

0

An Intrinsically Disordered Motif Mediates Diverse Actions of Monomeric C-reactive Protein.


ABSTRACT: Most proinflammatory actions of C-reactive protein (CRP) are only expressed following dissociation of its native pentameric assembly into monomeric form (mCRP). However, little is known about what underlies the greatly enhanced activities of mCRP. Here we show that a single sequence motif, i.e. cholesterol binding sequence (CBS; a.a. 35-47), is responsible for mediating the interactions of mCRP with diverse ligands. The binding of mCRP to lipoprotein component ApoB, to complement component C1q, to extracellular matrix components fibronectin and collagen, to blood coagulation component fibrinogen, and to membrane lipid component cholesterol, are all found to be markedly inhibited by the synthetic CBS peptide but not by other CRP sequences tested. Likewise, mutating CBS in mCRP also greatly impairs these interactions. Functional experiments further reveal that CBS peptide significantly reduces the effects of mCRP on activation of endothelial cells in vitro and on acute induction of IL-6 in mice. The potency and specificity of CBS are critically determined by the N-terminal residues Cys-36, Leu-37, and His-38; while the versatility of CBS appears to originate from its intrinsically disordered conformation polymorphism. Together, these data unexpectedly identify CBS as the major recognition site of mCRP and suggest that this motif may be exploited to tune the proinflammatory actions of mCRP.

SUBMITTER: Li HY 

PROVIDER: S-EPMC4861447 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

altmetric image

Publications

An Intrinsically Disordered Motif Mediates Diverse Actions of Monomeric C-reactive Protein.

Li Hai-Yun HY   Wang Jing J   Meng Fan F   Jia Zhe-Kun ZK   Su Yang Y   Bai Qi-Feng QF   Lv Ling-Ling LL   Ma Fu-Rong FR   Potempa Lawrence A LA   Yan Yong-Bin YB   Ji Shang-Rong SR   Wu Yi Y  

The Journal of biological chemistry 20160223 16


Most proinflammatory actions of C-reactive protein (CRP) are only expressed following dissociation of its native pentameric assembly into monomeric form (mCRP). However, little is known about what underlies the greatly enhanced activities of mCRP. Here we show that a single sequence motif, i.e. cholesterol binding sequence (CBS; a.a. 35-47), is responsible for mediating the interactions of mCRP with diverse ligands. The binding of mCRP to lipoprotein component ApoB, to complement component C1q,  ...[more]

Similar Datasets

| S-EPMC3501056 | biostudies-literature
| S-EPMC3510515 | biostudies-literature
| S-EPMC2748245 | biostudies-literature
| S-EPMC3457758 | biostudies-other
| S-EPMC6954741 | biostudies-literature
| S-EPMC3774778 | biostudies-literature
| S-EPMC3183800 | biostudies-other
| S-EPMC4008819 | biostudies-literature
| S-EPMC5338493 | biostudies-literature
| S-EPMC3029687 | biostudies-literature