Article ; Online: The active site of the SGNH hydrolase-like fold proteins
Current Research in Structural Biology, Vol 7, Iss , Pp 100123- (2024)
Nucleophile–oxyanion (Nuc-Oxy) and Acid–Base zones
2024
Abstract: SGNH hydrolase-like fold proteins are serine proteases with the default Asp-His-Ser catalytic triad. Here, we show that these proteins share two unique conserved structural organizations around the active site: (1) the Nuc-Oxy Zone around the catalytic ... ...
Abstract | SGNH hydrolase-like fold proteins are serine proteases with the default Asp-His-Ser catalytic triad. Here, we show that these proteins share two unique conserved structural organizations around the active site: (1) the Nuc-Oxy Zone around the catalytic nucleophile and the oxyanion hole, and (2) the Acid-Base Zone around the catalytic acid and base. The Nuc-Oxy Zone consists of 14 amino acids cross-linked with eight conserved intra- and inter-block hydrogen bonds. The Acid–Base Zone is constructed from a single fragment of the polypeptide chain, which incorporates both the catalytic acid and base, and whose N- and C-terminal residues are linked together by a conserved hydrogen bond. The Nuc-Oxy and Acid-Base Zones are connected by an SHLink, a two-bond conserved interaction from amino acids, adjacent to the catalytic nucleophile and base. |
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Keywords | SGNH-Hydrolases ; Catalytic triad ; Oxyanion hole ; Nuc–Oxy and Acid–Base zones ; SHLink ; Biology (General) ; QH301-705.5 |
Subject code | 540 |
Language | English |
Publishing date | 2024-01-01T00:00:00Z |
Publisher | Elsevier |
Document type | Article ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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