Structure of PDB 4s20 Chain D

Receptor sequence
>4s20D (length=1149) Species: 562 (Escherichia coli) [Search protein sequence]
TKTEEFDAIKIALASPDMIRSWSFGEVKKPETINYRTFKPERDGLFCARI
FGPVKDYECLCGKYKRLKHRGVICEKCGVEVTQTKVRRERMGHIELASPT
AHIWFLKSLPSRIGLLLDMPLRDIERVLYFESYVVIEGGMTNLERQQILT
EEQYLDALEEFGDEFDAKMGAEAIQALLKSMDLEQECEQLREELNETNSE
TKRKKLTKRIKLLEAFVQSGNKPEWMILTVLPVLPPDLRPLVPLDGGRFA
TSDLNDLYRRVINRNNRLKRLLDLAAPDIIVRNEKRMLQEAVDALLDNGR
RGRAITGSNKRPLKSLADMIKGKQGRFRQNLLGKRVDYSGRSVITVGPYL
RLHQCGLPKKMALELFKPFIYGKLELRGLATTIKAAKKMVEREEAVVWDI
LDEVIREHPVLLNRAPTLHRLGIQAFEPVLIEGKAIQLHPLVCAAYNADF
DGDQMAVHVPLTLEAQLEARALMMSTNNILSPANGEPIIVPSQDVVLGLY
YMTRDCVNAKGEGMVLTGPKEAERLYRSGLASLHARVKVRITEYEKDANG
ELVAKTSLKDTTVGRAILWMIVPKGLPYSIVNQALGKKAISKMLNTCYRI
LGLKPTVIFADQIMYTGFAYAARSGASVGIDDMVIPEKKHEIISEAEAEV
AEIQEQFQSGLVTAGERYNKVIDIWAAANDRVSKAMMDNLQTETVINRDG
QEEKQVSFNSIYMMADSGARGSAAQIRQLAGMRGLMAKPDGSIIETPITA
NFREGLNVLQYFISTHGARKGLADTALKTANSGYLTRRLVDVAQDLVVTE
DDCGTHEGIMMTPVIEGGDVKEPLRDRVLGRVTAEDPRNTLLHEQWCDLL
EENSVDAVKVRSVVSCDTDFGVCAHCYGRDLARGHIINKGEAIGVIAAQS
IGEPGTQLGGLPRVADLFEARRPKEPAILAEISGIVSFGKETKGKRRLVI
TPVDGSDPYEEMIPKWRQLNVFEGERVERGDVISDGPEAPHDILRLRGVH
AVTRYIVNEVQDVYRLQGVKINDKHIEVIVRQMLRKATIVNAGSSDFLEG
EQVEYSRVKIANRELEANGKVGATYSRDLLGITKASLATESFISAASFQE
TTRVLTEAAVAGKRDELRGLKENVIVGRLIPAGTGYAYHQDRMRRRAAG
3D structure
PDB4s20 Structural basis for transcription reactivation by RapA.
ChainD
Resolution4.7 Å
3D
structure
[Spin on]
[Spin off]
[Reset orientation]

[High quality]
[Low quality]

[White background]
[Black background]

[Download]
[Download structure with residue number starting from 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 dna D F260 A261 T262 D267 A426 T790 A791 F249 A250 T251 D256 A415 T779 A780
BS02 rna D R425 G463 D464 R414 G452 D453
BS03 ZN D C888 C898 C866 C876
BS04 MG D D460 D462 D449 D451
Gene Ontology
--> -->
 
 
UnboundLocalError		Python 3.6.8: /usr/bin/python3
Tue Feb 18 08:08:19 2025

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>()
   1443                 pubmed=display_regular_ligand(pdbid,asym_id,lig3,ligIdx,title)
   1444         else:
=> 1445             pubmed,uniprot=display_protein_receptor(pdbid,asym_id,title)
   1446     
   1447     uniprot_line=''
pubmed = '', uniprot = '', display_protein_receptor = <function display_protein_receptor>, pdbid = '4s20', asym_id = 'D', title = 'Structural basis for transcription reactivation by RapA.'
 /var/www/html/BioLiP/pdb.cgi in display_protein_receptor(pdbid='4s20', asym_id='D', title='Structural basis for transcription reactivation by RapA.')
    839 
    840     if go:
=>  841         display_go(go,uniprot,pdbid,asym_id)
    842     return pubmed,uniprot
    843 
global display_go = <function display_go>, go = '0003677,0003899,0006351', uniprot = '', pdbid = '4s20', asym_id = 'D'
 /var/www/html/BioLiP/pdb.cgi in display_go(go='0003677,0003899,0006351', uniprot='', pdbid='4s20', asym_id='D')
    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>