Cited by 276Biochemical and Molecular ResearchGout, Hyperuricemia, Uric AcidEnzyme Structure and Function

Proteolytic conversion of xanthine dehydrogenase from the NAD-dependent type to the O2-dependent type. Amino acid sequence of rat liver xanthine dehydrogenase and identification of the cleavage sites of the enzyme protein during irreversible conversion by trypsin.

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Amaya, Y., Yamazaki, K., Sato, M., Noda, K., Nishino, T., Nishino, T.·1990·Journal of Biological Chemistry

Abstract

The primary structure of rat liver xanthine dehydrogenase (EC 1.1.1.204) was determined by sequence analysis of cDNA and purified enzyme. The enzyme consists of 1,319 amino acid residues with a calculated molecular mass of 145,034 Da, including initiation methionine, and is homologous to the previously reported Drosophila melanogaster enzyme (Lee, C. S., Curtis, D., McCarron, M., Love, C., Gray, M., Bender, W., and Chovnick, A. (1987) Genetics 116, 55-66; Keith, T. P., Riley, M. A., Kreitman, M., Lewontin, R. C., Curtis, D., and Chambers, G. (1987) Genetics 116, 67-73) with an identity of 52%. The enzyme exists originally as the NAD-dependent type in a freshly prepared sample. When the purified NAD-dependent type enzyme was digested with trypsin, it cleaved into three fragments with molecular masses of 20, 40, and 85 kDa and was irreversibly converted to the O2-dependent type. Comparison of the amino-terminal sequences of the three peptide fragments with the cDNA-deduced sequence reveals that the 20-, 40-, and 85-kDa peptide fragments correspond residues to 1-184, 185-539, and 540-1319 of the enzyme, respectively. Comparison of the 5'-p-fluorosulfonylbenzoyladenosine-labeled peptide sequence of the chicken enzyme (Nishino, T., and Nishino, T. (1989) J. Biol. Chem. 264, 5468-5473) reveals that the NAD binding site is associated with the 40-kDa fragment portion of the enzyme. Hydropathy analysis around the cysteine residues suggests that the 2Fe/2S sites are associated with the 20-kDa fragment portion of the enzyme.

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Crossref · 10.1016/s0021-9258(18)77283-9

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Authors
Amaya, Y., Yamazaki, K., Sato, M., Noda, K., Nishino, T., & Nishino, T.
Affiliations
Yokohama City University (JP)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1990-08
Volume
265
Issue
24
Pages
14170-14175
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1568002412
Cited by
275
References
41
Citations by year
2025: 1 · 2024: 4 · 2023: 7 · 2022: 7 · 2021: 11 · 2020: 3 · 2019: 8 · 2018: 6 · 2017: 3 · 2016: 5 · 2015: 7 · 2014: 9 · 2013: 8 · 2012: 8
FWCI
3.42
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
  • Health Sciences › Medicine › Nephrology › Gout, Hyperuricemia, Uric Acid
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
xanthine dehydrogenase, trypsin cleavage site, primary structure, rat liver enzyme, NAD+ binding site, [2Fe-2S] cluster, cysteine residues, hydropathy analysis
MeSH terms
Chlorophyta, Amino Acid Sequence, Animals, Base Sequence, Cloning, Molecular, DNA, Drosophila, Ferredoxins, Ketone Oxidoreductases, Liver, Molecular Sequence Data, NAD, Oxygen, Protein Conformation, Sequence Homology, Nucleic Acid, Trypsin, Xanthine Dehydrogenase, Restriction Mapping, Gene Library, Rats

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