Role of the N-terminal seven residues of surfactant protein B (SP-B).
Role of the N-terminal seven residues of surfactant protein B (SP-B).
复制标题
DOI:
10.1371/journal.pone.0072821
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Booth V
中科院分区:
文献类型:
--
作者:
Sharifahmadian M;Sarker M;Palleboina D;Waring AJ;Walther FJ;Morrow MR;Booth V
Breathing is enabled by lung surfactant, a mixture of proteins and lipids that forms a surface-active layer and reduces surface tension at the air-water interface in lungs. Surfactant protein B (SP-B) is an essential component of lung surfactant. In this study we probe the mechanism underlying the important functional contributions made by the N-terminal 7 residues of SP-B, a region sometimes called the “insertion sequence”. These studies employed a construct of SP-B, SP-B (1–25,63–78), also called Super Mini-B, which is a 41-residue peptide with internal disulfide bonds comprising the N-terminal 7-residue insertion sequence and the N- and C-terminal helices of SP-B. Circular dichroism, solution NMR, and solid state 2H NMR were used to study the structure of SP-B (1–25,63–78) and its interactions with phospholipid bilayers. Comparison of results for SP-B (8–25,63–78) and SP-B (1–25,63–78) demonstrates that the presence of the 7-residue insertion sequence induces substantial disorder near the centre of the lipid bilayer, but without a major disruption of the overall mechanical orientation of the bilayers. This observation suggests the insertion sequence is unlikely to penetrate deeply into the bilayer. The 7-residue insertion sequence substantially increases the solution NMR linewidths, most likely due to an increase in global dynamics.
登录
查看更多内容
影响因子:
3.4
作者:
Antharam, Vijay C.;Elliott, Douglas W.;Long, Joanna R.
通讯作者:
Long, Joanna R.
影响因子:
2.9
作者:
Booth, V;Waring, AJ;Keough, KMW
通讯作者:
Keough, KMW
DOI:
10.1152/ajpregu.00496.2004
发表时间:
2005-11-01
影响因子:
2.8
作者:
Lang, CJ;Postle, AD;Daniels, CB
通讯作者:
Daniels, CB
影响因子:
5.8
作者:
Günther A;Ruppert C;Schmidt R;Markart P;Grimminger F;Walmrath D;Seeger W
通讯作者:
Seeger W
影响因子:
3.4
作者:
Farver, R. Suzanne;Mills, Frank D.;Long, Joanna R.
通讯作者:
Long, Joanna R.