Structure of PDB 7cxn Chain E

Receptor sequence

>7cxnE (length=596) Species: 2697049 (Severe acute respiratory syndrome coronavirus 2)

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

3D structure

• PDB: 7cxn Architecture of a SARS-CoV-2 mini replication and transcription complex.
• Chain: E
• Resolution: 3.84 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	rna	E	N179 H230 C309 S310 H311 R337 N361 A362 P408 T410 S485 S486 Y515 D534	N179 H230 C309 S310 H311 R337 N361 A362 P408 T410 S485 S486 Y515 D534
BS02	ZN	E	C8 C26 C29	C8 C26 C29
BS03	ZN	E	C50 C55 C72 H75	C50 C55 C72 H75
BS04	ZN	E	C19 H33 H39	C19 H33 H39

Gene Ontology

Molecular Function

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

External links

• PDB: RCSB:7cxn, PDBe:7cxn, PDBj:7cxn
• PDBsum: 7cxn
• PubMed: 33208736
• UniProt: P0DTD1|R1AB_SARS2 Replicase polyprotein 1ab (Gene Name=rep)