Structure of PDB 4v4p Chain AK

Receptor sequence
>4v4pAK (length=148) Species: 300852 (Thermus thermophilus HB8) [Search protein sequence]
MKVIFLKDVKGKGKKGEIKNVADGYANNFLFKQGLAIEATPANLKALEAQ
KQKEQRQAAEELANAKKLKEQLEKLTVTIPAKAGEGRLFGSITSKQIAES
LQAQHGLKLDKRKIELADAIRALGYTNVPVKLHPEVTATLKVHVTEQK
3D structure
PDB4v4p Translational operator of mRNA on the ribosome: how repressor proteins exclude ribosome binding.
ChainAK
Resolution5.5 Å
3D
structure
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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 AK D23 Y25 F29 A42 K45 K53 D23 Y25 F29 A42 K45 K53
Gene Ontology
--> -->
 
 
UnboundLocalError		Python 3.6.8: /usr/bin/python3
Sun Mar 9 09:04:46 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 = '4v4p', asym_id = 'AK', title = 'Translational operator of mRNA on the ribosome: how repressor proteins exclude ribosome binding.'
 /var/www/html/BioLiP/pdb.cgi in display_protein_receptor(pdbid='4v4p', asym_id='AK', title='Translational operator of mRNA on the ribosome: how repressor proteins exclude ribosome binding.')
    839 
    840     if go:
=>  841         display_go(go,uniprot,pdbid,asym_id)
    842     return pubmed,uniprot
    843 
global display_go = <function display_go>, go = '0003735,0005840,0006412', uniprot = '', pdbid = '4v4p', asym_id = 'AK'
 /var/www/html/BioLiP/pdb.cgi in display_go(go='0003735,0005840,0006412', uniprot='', pdbid='4v4p', asym_id='AK')
    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>