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- Scaletti, EmmaStockholm University,Lunds universitet,Stockholms universitet,Institutionen för biokemi och biofysik,Lund University, Sweden,Strukturell biokemi,Forskargrupper vid Lunds universitet,Structural Biochemistry,Lund University Research Groups (author)
The First Structure of an Active Mammalian dCTPase and its Complexes With Substrate Analogs and Products
- Article/chapterEnglish2020
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- Elsevier BV,2020
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-180414
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-180414URI
- https://doi.org/10.1016/j.jmb.2020.01.005DOI
- https://lup.lub.lu.se/record/28b124ae-9ef1-4930-b62c-6cd956f946b2URI
- http://kipublications.ki.se/Default.aspx?queryparsed=id:143205761URI
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- Language:English
- Summary in:English
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- Precise regulation of dNTPs within the cellular nucleotide pool is essential for high accuracy of DNA replication and is critical for retaining the genomic integrity. Recently, human dCTPase (deoxycytidine triphosphatase), also known as DCTPP1 (human all-alpha dCTP pyrophosphatase 1), has been revealed to be a key player in the balance of pyrimidine nucleotide concentrations within cells, with DCTPP1 deficiency causing DNA damage and genetic instability in both chromosomal and mitochondrial DNA. DCTPP1 also exhibits an additional house cleaning function as it has been shown to be highly active against modified cytidine triphosphates, such as 5-methyl-dCTP, which, if incorrectly incorporated into DNA can introduce undesirable epigenetic marking. To date, structural studies of mammalian dCTPase have been limited to inactive constructs, which do not provide information regarding the catalytic mechanism of this important enzyme. We present here the first structures of an active mammalian dCTPase from M. musculus in complex with the nonhydrolyzable substrate analog dCMPNPP and the products 5-Me-dCMP and dCMP. These structures provide clear insights into substrate binding and catalysis and clearly elucidate why previous structures of mammalian dCTPase were catalytically inactive. The overall structure of M. musculus dCTPase is highly similar to enzymes from the all-alpha NTP phosphohydrolase superfamily. Comparison of M. musculus dCTPase with homologs from a diverse range of mammals, including humans, shows that the residues, which contribute to substrate recognition, are entirely conserved, further supporting the importance of this enzyme in the protection of genomic integrity in mammalian cells.
Subject headings and genre
- NATURVETENSKAP Biologi Biokemi och molekylärbiologi hsv//swe
- NATURAL SCIENCES Biological Sciences Biochemistry and Molecular Biology hsv//eng
- MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Mikrobiologi inom det medicinska området hsv//swe
- MEDICAL AND HEALTH SCIENCES Basic Medicine Microbiology in the medical area hsv//eng
- dCTPase
- DCTPP1
- 5-Me-dCMP
- nucleotide pool regulation
- epigenetics
Added entries (persons, corporate bodies, meetings, titles ...)
- Claesson, MagnusStockholm University,Stockholms universitet,Institutionen för biokemi och biofysik(Swepub:su)macl7147 (author)
- Helleday, ThomasKarolinska Institutet,Karolinska Institute,University of Sheffield (author)
- Jemth, Ann-SofieKarolinska Institutet,Karolinska Institute (author)
- Stenmark, PålStockholm University,Lunds universitet,Stockholms universitet,Institutionen för biokemi och biofysik,Lund University, Sweden,Strukturell biokemi,Forskargrupper vid Lunds universitet,Structural Biochemistry,Lund University Research Groups(Swepub:lu)pa4463st (author)
- Stockholms universitetInstitutionen för biokemi och biofysik (creator_code:org_t)
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- In:Journal of Molecular Biology: Elsevier BV432:4, s. 1126-11420022-28361089-8638
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