Structure of PDB 4s20 Chain I Binding Site BS02

Receptor Information
>4s20 Chain I (length=1160) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
TKTEEFDAIKIALASPDMIRSWSFGEVKKPETINYRTFKPERDGLFCARI
FGPVKDYECLCGKYKRLKHRGVICEKCGVEVTQTKVRRERMGHIELASPT
AHIWFLKSLPSRIGLLLDMPLRDIERVLYFESYVVIEGGMTNLERQQILT
EEQYLDALEEFGDEFDAKMGAEAIQALLKSMDLEQECEQLREELNETNSE
TKRKKLTKRIKLLEAFVQSGNKPEWMILTVLPVLPPDLRPLVPLDGGRFA
TSDLNDLYRRVINRNNRLKRLLDLAAPDIIVRNEKRMLQEAVDALLDNGR
RGRAITGSNKRPLKSLADMIKGKQGRFRQNLLGKRVDYSGRSVITVGPYL
RLHQCGLPKKMALELFKPFIYGKLELRGLATTIKAAKKMVEREEAVVWDI
LDEVIREHPVLLNRAPTLHRLGIQAFEPVLIEGKAIQLHPLVCAAYNADF
DGDQMAVHVPLTLEAQLEARALMMSTNNILSPANGEPIIVPSQDVVLGLY
YMTRDCVNAKGEGMVLTGPKEAERLYRSGLASLHARVKVRITEYEKDANG
ELVAKTSLKDTTVGRAILWMIVPKGLPYSIVNQALGKKAISKMLNTCYRI
LGLKPTVIFADQIMYTGFAYAARSGASVGIDDMVIPEKKHEIISEAEAEV
AEIQEQFQSGLVTAGERYNKVIDIWAAANDRVSKAMMDNLQTETVINRDG
QEEKQVSFNSIYMMADSGARGSAAQIRQLAGMRGLMAKPDGSIIETPITA
NFREGLNVLQYFISTHGARKGLADTALKTANSGYLTRRLVDVAQDLVVTE
DDCGTHEGIMMTPVIEGGDVKEPLRDRVLGRVTAEDVLKPGTADILVPRN
TLLHEQWCDLLEENSVDAVKVRSVVSCDTDFGVCAHCYGRDLARGHIINK
GEAIGVIAAQSIGEPGTQLGGLPRVADLFEARRPKEPAILAEISGIVSFG
KETKGKRRLVITPVDGSDPYEEMIPKWRQLNVFEGERVERGDVISDGPEA
PHDILRLRGVHAVTRYIVNEVQDVYRLQGVKINDKHIEVIVRQMLRKATI
VNAGSSDFLEGEQVEYSRVKIANRELEANGKVGATYSRDLLGITKASLAT
ESFISAASFQETTRVLTEAAVAGKRDELRGLKENVIVGRLIPAGTGYAYH
QDRMRRRAAG
Ligand information
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB4s20 Structural basis for transcription reactivation by RapA.
Resolution4.7 Å
Binding residue
(original residue number in PDB)		R425 G463 D464
Binding residue
(residue number reindexed from 1)		R414 G452 D453
Gene Ontology
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UnboundLocalError		Python 3.6.8: /usr/bin/python3
Mon Nov 25 00:42:43 2024

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.

 /var/www/html/BioLiP/pdb.cgi in <module>()
   1435     title=pdb2title(pdbid)
   1436     if bs.startswith("BS"):
=> 1437         pubmed,uniprot=display_interaction(pdbid,asym_id,bs,title)
   1438     else:
   1439         if lig3:
pubmed = '', uniprot = '', display_interaction = <function display_interaction>, pdbid = '4s20', asym_id = 'I', bs = 'BS02', title = 'Structural basis for transcription reactivation by RapA.'
 /var/www/html/BioLiP/pdb.cgi in display_interaction(pdbid='4s20', asym_id='I', bs='BS02', title='Structural basis for transcription reactivation by RapA.')
   1295         display_ec(ec,csaOrig,csaRenu)
   1296     if go:
=> 1297         display_go(go,uniprot,pdbid,asym_id)
   1298     return pubmed,uniprot
   1299 
global display_go = <function display_go>, go = '0003677,0003899,0006351', uniprot = '', pdbid = '4s20', asym_id = 'I'
 /var/www/html/BioLiP/pdb.cgi in display_go(go='0003677,0003899,0006351', uniprot='', pdbid='4s20', asym_id='I')
    480         '''.replace("$namespace_link",namespace_link
    481           ).replace("$namespace",namespace
=>  482           ).replace("$uniprot",u
    483         ))
    484         for l,(term,name) in enumerate(go2aspect[Aspect]):
u undefined

UnboundLocalError: local variable 'u' referenced before assignment
      args = ("local variable 'u' referenced before assignment",)
      with_traceback = <built-in method with_traceback of UnboundLocalError object>