Deducing the Crystal Structure of MERS-CoV Helicase.
Identifieur interne : 000849 ( PubMed/Curation ); précédent : 000848; suivant : 000850Deducing the Crystal Structure of MERS-CoV Helicase.
Auteurs : Sheng Cui [République populaire de Chine] ; Wei Hao [République populaire de Chine]Source :
- Methods in molecular biology (Clifton, N.J.) [ 1940-6029 ] ; 2020.
Abstract
RNA virus encodes a helicase essential for viral RNA transcription and replication when the genome size is larger than 7 kb. Coronavirus (CoV) has an exceptionally large RNA genome (~30 kb) and it encodes an essential replicase, the nonstructural protein 13 (nsp13), a member of superfamily 1 helicases. Nsp13 is among the evolutionary most conserved proteins not only in CoVs but also in nidovirales. Thus, it is considered as an important drug target. However, the high-resolution structure of CoV nsp13 remained unavailable even until more than a decade after the outbreak of the severe acute respiratory syndrome coronavirus (SARS-CoV) in 2003, which hindered the structure-based drug design. This is in part due to the intrinsic flexibility of nsp13. Here, we describe protocols of deducing the crystal structure of Middle East respiratory syndrome coronavirus (MERS-CoV) helicase in detail, which include protein expression, purification, crystallization, enzymatic characterization, and structure determination. With these methods, catalytically active recombinant MERS-CoV nsp13 protein can be prepared and crystallized and the crystal structure can be solved.
DOI: 10.1007/978-1-0716-0211-9_6
PubMed: 31883088
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<front><div type="abstract" xml:lang="en">RNA virus encodes a helicase essential for viral RNA transcription and replication when the genome size is larger than 7 kb. Coronavirus (CoV) has an exceptionally large RNA genome (~30 kb) and it encodes an essential replicase, the nonstructural protein 13 (nsp13), a member of superfamily 1 helicases. Nsp13 is among the evolutionary most conserved proteins not only in CoVs but also in nidovirales. Thus, it is considered as an important drug target. However, the high-resolution structure of CoV nsp13 remained unavailable even until more than a decade after the outbreak of the severe acute respiratory syndrome coronavirus (SARS-CoV) in 2003, which hindered the structure-based drug design. This is in part due to the intrinsic flexibility of nsp13. Here, we describe protocols of deducing the crystal structure of Middle East respiratory syndrome coronavirus (MERS-CoV) helicase in detail, which include protein expression, purification, crystallization, enzymatic characterization, and structure determination. With these methods, catalytically active recombinant MERS-CoV nsp13 protein can be prepared and crystallized and the crystal structure can be solved.</div>
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<Abstract><AbstractText>RNA virus encodes a helicase essential for viral RNA transcription and replication when the genome size is larger than 7 kb. Coronavirus (CoV) has an exceptionally large RNA genome (~30 kb) and it encodes an essential replicase, the nonstructural protein 13 (nsp13), a member of superfamily 1 helicases. Nsp13 is among the evolutionary most conserved proteins not only in CoVs but also in nidovirales. Thus, it is considered as an important drug target. However, the high-resolution structure of CoV nsp13 remained unavailable even until more than a decade after the outbreak of the severe acute respiratory syndrome coronavirus (SARS-CoV) in 2003, which hindered the structure-based drug design. This is in part due to the intrinsic flexibility of nsp13. Here, we describe protocols of deducing the crystal structure of Middle East respiratory syndrome coronavirus (MERS-CoV) helicase in detail, which include protein expression, purification, crystallization, enzymatic characterization, and structure determination. With these methods, catalytically active recombinant MERS-CoV nsp13 protein can be prepared and crystallized and the crystal structure can be solved.</AbstractText>
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