7cr5

From Proteopedia

Complex structure of a human monoclonal antibody with SARS-CoV-2 nucleocapsid protein NTD

PDB ID 7cr5

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Structural highlights

7cr5 is a 3 chain structure with sequence from Homo sapiens and Severe acute respiratory syndrome coronavirus 2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.08Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

NCAP_SARS2 Packages the positive strand viral genome RNA into a helical ribonucleocapsid (RNP) and plays a fundamental role during virion assembly through its interactions with the viral genome and membrane protein M. Plays an important role in enhancing the efficiency of subgenomic viral RNA transcription as well as viral replication.

Publication Abstract from PubMed

Although human antibodies elicited by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleocapsid (N) protein are profoundly boosted upon infection, little is known about the function of N-reactive antibodies. Herein, we isolate and profile a panel of 32 N protein-specific monoclonal antibodies (mAbs) from a quick recovery coronavirus disease-19 (COVID-19) convalescent patient who has dominant antibody responses to the SARS-CoV-2 N protein rather than to the SARS-CoV-2 spike (S) protein. The complex structure of the N protein RNA binding domain with the highest binding affinity mAb (nCoV396) reveals changes in the epitopes and antigen's allosteric regulation. Functionally, a virus-free complement hyperactivation analysis demonstrates that nCoV396 specifically compromises the N protein-induced complement hyperactivation, which is a risk factor for the morbidity and mortality of COVID-19 patients, thus laying the foundation for the identification of functional anti-N protein mAbs.

A SARS-CoV-2 antibody curbs viral nucleocapsid protein-induced complement hyperactivation.,Kang S, Yang M, He S, Wang Y, Chen X, Chen YQ, Hong Z, Liu J, Jiang G, Chen Q, Zhou Z, Zhou Z, Huang Z, Huang X, He H, Zheng W, Liao HX, Xiao F, Shan H, Chen S Nat Commun. 2021 May 11;12(1):2697. doi: 10.1038/s41467-021-23036-9. PMID:33976229^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Kang S, Yang M, He S, Wang Y, Chen X, Chen YQ, Hong Z, Liu J, Jiang G, Chen Q, Zhou Z, Zhou Z, Huang Z, Huang X, He H, Zheng W, Liao HX, Xiao F, Shan H, Chen S. A SARS-CoV-2 antibody curbs viral nucleocapsid protein-induced complement hyperactivation. Nat Commun. 2021 May 11;12(1):2697. PMID:33976229 doi:10.1038/s41467-021-23036-9