Structure of PDB 7re3 Chain K

Receptor sequence

>7re3K (length=590) Species: 2697049 (Severe acute respiratory syndrome coronavirus 2)

AVGACVLCNSQTSLRCGACIRRPFLCCKCCYDHVISTSHKLVLSVNPYVC
NAPGCDVTDVTQLYLGGMSYYCKSHKPPISFPLCANGQVFGLYKNTCVGS
DNVTDFNAIATCDWTNAGDYILANTCTERLKLFAAETLKATEETFKLSYG
IATVREVLSDRELHLSWEVGKPRPPLNRNYVFTGYRVTKNSKVQIGEYTF
EKGDYGDAVVYRGTTTYKLNVGDYFVLTSHTVMPLSAPTLVPQEHYVRIT
GLYPTLNISDEFSSNVANYQKVGMQKYSTLQGPPGTGKSHFAIGLALYYP
SARIVYTACSHAAVDALCEKALKYLPIDKCSRIIPARARVECFDKFKVNS
TLEQYVFCTVNALPETTADIVVFDEISMATNYDLSVVNARLRAKHYVYIG
DPAQLPAPRTLLTKGTLEPEYFNSVCRLMKTIGPDMFLGTCRRCPAEIVD
TVSALVYDNKLKAHKDKSAQCFKMFYKGVITHDVSSAINRPQIGVVREFL
TRNPAWRKAVFISPYNSQNAVASKILGLPTQTVDSSQGSEYDYVIFTQTT
ETAHSCNVNRFNVAITRAKVGILCIMSDRDLYDKLQFTSL

3D structure

• PDB: 7re3 Ensemble cryo-EM reveals conformational states of the nsp13 helicase in the SARS-CoV-2 helicase replication-transcription complex.
• Chain: K
• Resolution: 3.33 Å

Enzymatic activity

• Enzyme Commision number: 2.1.1.56: mRNA (guanine-N(7))-methyltransferase.
  2.1.1.57: methyltransferase cap1.
  2.7.7.48: RNA-directed RNA polymerase.
  2.7.7.50: mRNA guanylyltransferase.
  3.1.13.-
  3.4.19.12: ubiquitinyl hydrolase 1.
  3.4.22.-
  3.4.22.69: SARS coronavirus main proteinase.
  3.6.4.12: DNA helicase.
  3.6.4.13: RNA helicase.
  4.6.1.-

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	ZN	K	C5 C26 C29	C5 C26 C29
BS02	ZN	K	C50 C55 C72 H75	C50 C55 C72 H75
BS03	ZN	K	C16 C19 H33 H39	C16 C19 H33 H39
BS04	ADP	K	E261 G285 T286 G287 K288 S289 H290	E261 G285 T286 G287 K288 S289 H290
BS05	AF3	K	S289 Q404	S289 Q404

Gene Ontology

Molecular Function

• GO:0004386 helicase activity
• GO:0005524 ATP binding
• GO:0008270 zinc ion binding

External links

• PDB: RCSB:7re3, PDBe:7re3, PDBj:7re3
• PDBsum: 7re3
• PubMed: 35260847
• UniProt: P0DTD1|R1AB_SARS2 Replicase polyprotein 1ab (Gene Name=rep)