Structure of PDB 4v4p Chain BK

Receptor sequence

>4v4pBK (length=138) Species: 300852 (Thermus thermophilus HB8)

MLTDPIADMLTRIRNATRVYKESTDVPASRFKEEILRILAREGFIKGYER
VDVDGKPYLRVYLKYGPRRQGPDPRPEQVIHHIRRISKPGRRVYVGVKEI
PRVRRGLGIAILSTSKGVLTDREARKLGVGGELICEVW

3D structure

• PDB: 4v4p Translational operator of mRNA on the ribosome: how repressor proteins exclude ribosome binding.
• Chain: BK
• Resolution: 5.5 Å

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	BK	M1 L2 T3 P5 T11 R12 R14 N15 V19 S29 R30 F31 K56 K88 P89 R91 R92 Y94 V95 G96 V97 S113 T114 S115 G117 G128 V129 G130 E132	M1 L2 T3 P5 T11 R12 R14 N15 V19 S29 R30 F31 K56 K88 P89 R91 R92 Y94 V95 G96 V97 S113 T114 S115 G117 G128 V129 G130 E132

Gene Ontology

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UnboundLocalError

Python 3.6.8: /usr/bin/python3 Sun Mar 9 08:47:36 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 = 'BK', 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='BK', 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 = 'BK'

 /var/www/html/BioLiP/pdb.cgi in display_go(go='0003735,0005840,0006412', uniprot='', pdbid='4v4p', asym_id='BK')

    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>