Direct interaction of complement factor H with the C1 domain of HIV type 1 glycoprotein 120.
A protein that binds specifically to Env 105-119 (HEDIISLWDQSLKPC) was found in pools of normal human plasma when this peptide was used in affinity chromatography procedures. These samples represented the negative control in experiments aimed at the purification of putative human antibodies to the Env 105-119 region from AIDS sera. In this article we describe the biochemical characterization of this protein, which turned out to be complement factor H (CFH). We propose a functional role for this protein in the complex, early steps of CD4-dependent HIV infection.
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Dipartimento di Biologia e Genetica per le Scienze Mediche, Università di Milano, Milan, Italy.
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Longhi
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Clivio
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D000595:Amino Acid Sequence; D002852:Chromatography, Ion Exchange; D017242:Complement Factor H / Q000302:isolation & purification / Q000378:metabolism*; D015726:Giant Cells / Q000821:virology; D015483:HIV Antibodies / Q000276:immunology; D015699:HIV Envelope Protein gp120 / Q000276:immunology / Q000378:metabolism*; D015700:HIV Envelope Protein gp41 / Q000378:metabolism; D015497:HIV-1 / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D008969:Molecular Sequence Data; D011485:Protein Binding; D015728:Receptors, HIV / Q000378:metabolism
C493495:CFH protein, human; D015483:HIV Antibodies; D015699:HIV Envelope Protein gp120; D015700:HIV Envelope Protein gp41; D015728:Receptors, HIV; D017242:Complement Factor H