Carbohydrate recognition domain of surfactant protein D mediates interactions with Pneumocystis carinii glycoprotein A.
Carbohydrate recognition domain of surfactant protein D mediates interactions with Pneumocystis carinii glycoprotein A.
复制标题
表面活性剂蛋白 D 的碳水化合物识别域介导与卡氏肺囊虫糖蛋白 A 的相互作用。
DOI:
10.1165/ajrcmb.24.4.3504
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发表时间:
2001
影响因子:
6.4
通讯作者:
Limper,AH
中科院分区:
文献类型:
--
作者:
Vuk-Pavlovic,Z;Standing,JE;Crouch,EC;Limper,AH
Pneumocystis cariniicontinues to cause severe pneumonia in immunocompromised patients. Surfactant protein D (SP-D), a lung collectin, markedly accumulates duringP. cariniipneumonia and binds to glycoprotein A (gpA) on the surface ofP. carinii, thereby enhancing interactions with alveolar macrophages. Herein, we report the structural basis of the interaction of SP-D with gpA. We demonstrate that natural SP-D binds to purified gpA in the presence of 2 mM calcium in a saturable, concentration-dependent manner, which is abolished by 10 mM ethylenediaminetetraacetic acid. Increasing concentrations of calcium under otherwise cation-free conditions significantly enhance SP-D binding to gpA, whereas manganese and magnesium cations have minimal effect. Maximal SP-D binding occurs at pH 7.4, with significant inhibition at pH 4. SP-D binding to gpA is also competitively inhibited by maltose > glucose > mannose > N-acetyl-glucosamine. Comparison of the binding of various natural and recombinant forms of SP-D to gpA reveals that the number of carbohydrate recognition domains (CRDs) in a given SP-D form determines the relative extent of binding to gpA. Maximal binding is observed with natural SP-D (dodecamers and higher order SP-D complexes) followed by recombinant dodecamers. In contrast, recombinant full-length trimers exhibit substantially less binding, which is similar to that observed with a recombinant truncated molecule consisting of the CRD and neck regions, and containing trimers of this portion of the molecule. Taken together, these findings strongly indicate that the CRD of SP-D mediates interaction withP. cariniigpA through its attached oligosaccharides and that the extent of SP-D binding toP. cariniiis greatest with dodecamers and higher order forms of SP-D.
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DOI:
--
发表时间:
1994
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Neese,LW;Standing,JE;Olson,EJ;Castro,M;Limper,AH
通讯作者:
Limper,AH
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Crouch,E;Chang,D;Rust,K;Persson,A;Heuser,J
通讯作者:
Heuser,J
DOI:
--
发表时间:
1993
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
Jinhua Lu;H. Wiedemann;Uffe Holmskov;Steffen Thiel;R. Timpl;Kenneth B. M. Reid
通讯作者:
Kenneth B. M. Reid
影响因子:
4.4
作者:
C. D. Gaynor;F. X. McCormack;D. Voelker;S. McGowan;L. Schlesinger
通讯作者:
C. D. Gaynor;F. X. McCormack;D. Voelker;S. McGowan;L. Schlesinger
DOI:
10.1172/jci117972
发表时间:
1995
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
O'Riordan,DM;Standing,JE;Kwon,KY;Chang,D;Crouch,EC;Limper,AH
通讯作者:
Limper,AH