Naturally occurring fragments from two distinct regions of the prostatic acid phosphatase form amyloidogenic enhancers of HIV infection |
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Authors: | Arnold Franziska Schnell Jacqueline Zirafi Onofrio Stürzel Christina Meier Christoph Weil Tanja Ständker Ludger Forssmann Wolf-Georg Roan Nadia R Greene Warner C Kirchhoff Frank Münch Jan |
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Institution: | Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany. |
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Abstract: | Semen is the major vector for HIV-1 transmission. We previously isolated C-proximal fragments of the prostatic acid phosphatase (PAP) from semen which formed amyloid fibrils that potently enhanced HIV infection. Here, we used the same methodology and identified another amyloidogenic peptide. Surprisingly, this peptide is derived from an N-proximal fragment of PAP (PAP85-120) and forms, similar to the C-proximal fragments, positively charged fibrillar structures that increase virion attachment to cells. Our results provide a first example for amyloid formation by fragments of distinct regions of the same precursor and further emphasize the possible importance of amyloidogenic peptides in HIV transmission. |
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