Structural sequence evolution and computational modeling approaches of the complement system in leishmaniasis.

The complement system is one of the first barriers and consists of well-balanced cascades of reactions which generates anaphylatoxins such as C5a and C3a. A G-protein coupled receptor C5a anaphylatoxin chemotactic receptor 1 (C5AR1, also known as CD88) is the receptor for C5a which is present on cells of myeloid origin. Owing to difficulty in obtaining crystal structures of GPCRs in either inactive or active state, accurate structural modeling is still highly desirable for the majority of GPCRs. In an attempt to dissect the conformational changes associated with GPCR activation, computational modeling approaches is being pursued in this paper along with the evolutionary divergence to deal with the structural variability.

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