6W4H

1.80 Angstrom Resolution Crystal Structure of NSP16 - NSP10 Complex from SARS-CoV-2


ChainDomainClassArchitectureTopologyHomology
3.40.50.150 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Vaccinia Virus protein VP39

Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
PF06460Coronavirus 2'-O-methyltransferase (CoV_Methyltr_2)Coronavirus 2'-O-methyltransferaseThis domain covers the NSP16 region of the coronavirus polyprotein. The SARS-CoV RNA cap SAM-dependent (nucleoside-2'-O-)-methyltransferase (2'-O-MTase) is a heterodimer comprising SARS-CoV nsp10 and nsp16. When bound to nsp10, nsp16 is active as a t ...This domain covers the NSP16 region of the coronavirus polyprotein. The SARS-CoV RNA cap SAM-dependent (nucleoside-2'-O-)-methyltransferase (2'-O-MTase) is a heterodimer comprising SARS-CoV nsp10 and nsp16. When bound to nsp10, nsp16 is active as a type-0 RNA cap-dependent 2'-O-MTase, ie., active only when the cap guanine is methylated at its N7 position. Nsp10 binds to nsp16 through an activation surface area in nsp10, and the resulting complex exhibits RNA cap (nucleoside-2'-O)-methyltransferase activity. Nsp10 is a double zinc finger protein together with nsp4, nsp5, nsp12, nsp14, and nsp16, nsp10 has been found to be essential in the assembly of a functional replication/transcription complex. Nsp16 adopts a typical fold of the S-adenosylmethionine-dependent methyltransferase (SAM) family as defined initially for the catechol O-MTase but it lacks several elements of the canonical MTase fold, such as helices B and C. The nsp16 topology matches those of dengue virus NS5 N-terminal domain and of vaccinia virus VP39 MTases [1, 2, 3].
Domain
PF09401Coronavirus RNA synthesis protein NSP10 (CoV_NSP10)Coronavirus RNA synthesis protein NSP10- Family

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
2'-O-methyltransferase
Non-structural protein 10