Structure of PDB 4xsx Chain D

Receptor sequence

>4xsxD (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: 4xsx CBR antimicrobials inhibit RNA polymerase via at least two bridge-helix cap-mediated effects on nucleotide addition.
• Chain: D
• Resolution: 3.708 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	42S	D	P750 I755 L770 F773	P743 I748 L763 F766	PDBbind-CN: -logKd/Ki=5.00,IC50~10uM
BS02	MG	D	D460 D462 D464	D453 D455 D457
BS03	ZN	D	C72 C85 C88	C65 C78 C81
BS04	ZN	D	C814 C888 C898	C807 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:4xsx, PDBe:4xsx, PDBj:4xsx
• PDBsum: 4xsx
• PubMed: 26195788
• UniProt: A7ZUK2|RPOC_ECO24 DNA-directed RNA polymerase subunit beta' (Gene Name=rpoC)