Structure of PDB 4xsz Chain D

Receptor sequence

>4xszD (length=1166) Species: 331111 (Escherichia coli O139:H28 str. E24377A)

LKAQTKTEEFDAIKIALASPDMIRSWSFGEVKKPETINYRTFKPERDGLF
CARIFGPVKDYECLCGKYKRLKHRGVICEKCGVEVTQTKVRRERMGHIEL
ASPTAHIWFLKSLPSRIGLLLDMPLRDIERVLYFESYVVIEGGMTNLERQ
QILTEEQYLDALEEFGDEFDAKMGAEAIQALLKSMDLEQECEQLREELNE
TNSETKRKKLTKRIKLLEAFVQSGNKPEWMILTVLPVLPPDLRPLVPLDG
GRFATSDLNDLYRRVINRNNRLKRLLDLAAPDIIVRNEKRMLQEAVDALL
DNGRRGRAITGSNKRPLKSLADMIKGKQGRFRQNLLGKRVDYSGRSVITV
GPYLRLHQCGLPKKMALELFKPFIYGKLELRGLATTIKAAKKMVEREEAV
VWDILDEVIREHPVLLNRAPTLHRLGIQAFEPVLIEGKAIQLHPLVCAAY
NADFDGDQMAVHVPLTLEAQLEARALMMSTNNILSPANGEPIIVPSQDVV
LGLYYMTRDCVNAKGEGMVLTGPKEAERLYRSGLASLHARVKVRITEYEK
DANGELVAKTSLKDTTVGRAILWMIVPKGLPYSIVNQALGKKAISKMLNT
CYRILGLKPTVIFADQIMYTGFAYAARSGASVGIDDMVIPEKKHEIISEA
EAEVAEIQEQFQSGLVTAGERYNKVIDIWAAANDRVSKAMMDNLQTETVI
NRDGQEEKQVSFNSIYMMADSGARGSAAQIRQLAGMRGLMAKPDGSIIET
PITANFREGLNVLQYFISTHGARKGLADTALKTANSGYLTRRLVDVAQDL
VVTEDDCGTHEGIMMTPVIEGGDVKEPLRDRVLGRVTAEDVLKPGTADIL
VPRNTLLHEQWCDLLEENSVDAVKVRSVVSCDTDFGVCAHCYGRDLARGH
IINKGEAIGVIAAQSIGEPGTQLTTGGLPRVADLFEARRPKEPAILAEIS
GIVSFGKETKGKRRLVITPVDGSDPYEEMIPKWRQLNVFEGERVERGDVI
SDGPEAPHDILRLRGVHAVTRYIVNEVQDVYRLQGVKINDKHIEVIVRQM
LRKATIVNAGSSDFLEGEQVEYSRVKIANRELEANGKVGATYSRDLLGIT
KASLATESFISAASFQETTRVLTEAAVAGKRDELRGLKENVIVGRLIPAG
TGYAYHQDRMRRRAAG

3D structure

• PDB: 4xsz CBR antimicrobials inhibit RNA polymerase via at least two bridge-helix cap-mediated effects on nucleotide addition.
• Chain: D
• Resolution: 3.683 Å

Enzymatic activity

• Enzyme Commision number: 2.7.7.6: DNA-directed RNA polymerase.

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	42U	D	K749 P750 I755 I774	K742 P743 I748 I767	PDBbind-CN: -logKd/Ki=5.60,IC50=2.5uM
BS02	MG	D	D460 D462 D464	D453 D455 D457
BS03	ZN	D	C72 C85	C65 C78
BS04	ZN	D	C888 C898	C881 C891

Gene Ontology

Molecular Function

• GO:0000287 magnesium ion binding
• GO:0003677 DNA binding
• GO:0003899 DNA-directed 5'-3' RNA polymerase activity
• GO:0008270 zinc ion binding
• GO:0016779 nucleotidyltransferase activity
• GO:0034062 5'-3' RNA polymerase activity
• GO:0046872 metal ion binding

Biological Process

• GO:0006351 DNA-templated transcription

Cellular Component

• GO:0000428 DNA-directed RNA polymerase complex

External links

• PDB: RCSB:4xsz, PDBe:4xsz, PDBj:4xsz
• PDBsum: 4xsz
• PubMed: 26195788
• UniProt: A7ZUK2|RPOC_ECO24 DNA-directed RNA polymerase subunit beta' (Gene Name=rpoC)