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Antibody somatic hypermutation (SHM) and affinity maturation enhance antigen recognition by modifying antibody paratope structure to improve its complementarity with the target epitope. SHM-induced changes in paratope dynamics may also contribute to antibody maturation, but direct evidence of this is limited. Here, we examine two classes of HIV-1 broadly neutralizing antibodies (bNAbs) for SHM-induced...
The interface between the HIV-1 gp120 envelope glycoprotein and the CD4 receptor contains an unusual interfacial cavity, the “Phe43 cavity”, which CD4-mimetic miniproteins with nonnatural extensions can potentially utilize to enhance their neutralization of HIV-1. Here, we report cocrystal structures of HIV-1 gp120 with miniproteins M48U1 and M48U7, which insert cyclohexylmethoxy and 5-hydroxypentylmethoxy...
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