Crystallization and preliminary X-ray crystallographic analysis of a nonstructural protein 15 mutant from Human coronavirus 229E.
Identifieur interne : 000D73 ( PubMed/Corpus ); précédent : 000D72; suivant : 000D74Crystallization and preliminary X-ray crystallographic analysis of a nonstructural protein 15 mutant from Human coronavirus 229E.
Auteurs : Tong Huo ; Xiang LiuSource :
- Acta crystallographica. Section F, Structural biology communications [ 2053-230X ] ; 2015.
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- KwdEn :
- MESH :
Abstract
Nonstructural protein 15 (nsp15), also called endoribonuclease, is a gene product of open reading frame 1b (ORF 1b) in coronaviruses. It is an important enzyme in the transcription/replication process involved in discontinuous negative-strand RNA synthesis. In this work, mutants of nsp15 from Human coronavirus 229E (HCoV-229E) were made based on structural analysis of the homologous nsp15s in Severe acute respiratory syndrome coronavirus (SARS-CoV) and Mouse hepatitis virus (MHV). The I26A/N52A mutant of nsp15 was overexpressed, purified and crystallized, and this mutant led to a trimeric form rather than hexamers or monomers. Crystals of trimeric nsp15 were obtained by the hanging-drop vapour-diffusion method using polyethylene glycol as a precipitant and diffracted to 2.5 Å resolution. The crystals belonged to space group C2221, with unit-cell parameters a = 85.9, b = 137.5, c = 423.1 Å, α = β = γ = 90°.
DOI: 10.1107/S2053230X15007359
PubMed: 26323302
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pubmed:26323302Le document en format XML
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<front><div type="abstract" xml:lang="en">Nonstructural protein 15 (nsp15), also called endoribonuclease, is a gene product of open reading frame 1b (ORF 1b) in coronaviruses. It is an important enzyme in the transcription/replication process involved in discontinuous negative-strand RNA synthesis. In this work, mutants of nsp15 from Human coronavirus 229E (HCoV-229E) were made based on structural analysis of the homologous nsp15s in Severe acute respiratory syndrome coronavirus (SARS-CoV) and Mouse hepatitis virus (MHV). The I26A/N52A mutant of nsp15 was overexpressed, purified and crystallized, and this mutant led to a trimeric form rather than hexamers or monomers. Crystals of trimeric nsp15 were obtained by the hanging-drop vapour-diffusion method using polyethylene glycol as a precipitant and diffracted to 2.5 Å resolution. The crystals belonged to space group C2221, with unit-cell parameters a = 85.9, b = 137.5, c = 423.1 Å, α = β = γ = 90°. </div>
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<Abstract><AbstractText>Nonstructural protein 15 (nsp15), also called endoribonuclease, is a gene product of open reading frame 1b (ORF 1b) in coronaviruses. It is an important enzyme in the transcription/replication process involved in discontinuous negative-strand RNA synthesis. In this work, mutants of nsp15 from Human coronavirus 229E (HCoV-229E) were made based on structural analysis of the homologous nsp15s in Severe acute respiratory syndrome coronavirus (SARS-CoV) and Mouse hepatitis virus (MHV). The I26A/N52A mutant of nsp15 was overexpressed, purified and crystallized, and this mutant led to a trimeric form rather than hexamers or monomers. Crystals of trimeric nsp15 were obtained by the hanging-drop vapour-diffusion method using polyethylene glycol as a precipitant and diffracted to 2.5 Å resolution. The crystals belonged to space group C2221, with unit-cell parameters a = 85.9, b = 137.5, c = 423.1 Å, α = β = γ = 90°. </AbstractText>
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