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●I-TASSER ●I-TASSER-MTD ●C-I-TASSER ●CR-I-TASSER ●QUARK ●C-QUARK ●LOMETS ●MUSTER ●CEthreader ●SEGMER ●DeepFold ●DeepFoldRNA ●FoldDesign ●COFACTOR ●COACH ●MetaGO ●TripletGO ●IonCom ●FG-MD ●ModRefiner ●REMO ●DEMO ●DEMO-EM ●SPRING ●COTH ●Threpp ●PEPPI ●BSpred ●ANGLOR ●EDock ●BSP-SLIM ●SAXSTER ●FUpred ●ThreaDom ●ThreaDomEx ●EvoDesign ●BindProf ●BindProfX ●SSIPe ●GPCR-I-TASSER ●MAGELLAN ●ResQ ●STRUM ●DAMpred

●TM-score ●TM-align ●US-align ●MM-align ●RNA-align ●NW-align ●LS-align ●EDTSurf ●MVP ●MVP-Fit ●SPICKER ●HAAD ●PSSpred ●3DRobot ●MR-REX ●I-TASSER-MR ●SVMSEQ ●NeBcon ●ResPRE ●TripletRes ●DeepPotential ●WDL-RF ●ATPbind ●DockRMSD ●DeepMSA ●FASPR ●EM-Refiner ●GPU-I-TASSER

●BioLiP ●E. coli ●GLASS ●GPCR-HGmod ●GPCR-RD ●GPCR-EXP ●Tara-3D ●TM-fold ●DECOYS ●POTENTIAL ●RW/RWplus ●EvoEF ●HPSF ●THE-DB ●ADDRESS ●Alpaca-Antibody ●CASP7 ●CASP8 ●CASP9 ●CASP10 ●CASP11 ●CASP12 ●CASP13 ●CASP14

Structure of PDB 4s20 Chain I

Receptor sequence >4s20I (length=1160) Species: 562 (Escherichia coli) [Search protein sequence] TKTEEFDAIKIALASPDMIRSWSFGEVKKPETINYRTFKPERDGLFCARI FGPVKDYECLCGKYKRLKHRGVICEKCGVEVTQTKVRRERMGHIELASPT AHIWFLKSLPSRIGLLLDMPLRDIERVLYFESYVVIEGGMTNLERQQILT EEQYLDALEEFGDEFDAKMGAEAIQALLKSMDLEQECEQLREELNETNSE TKRKKLTKRIKLLEAFVQSGNKPEWMILTVLPVLPPDLRPLVPLDGGRFA TSDLNDLYRRVINRNNRLKRLLDLAAPDIIVRNEKRMLQEAVDALLDNGR RGRAITGSNKRPLKSLADMIKGKQGRFRQNLLGKRVDYSGRSVITVGPYL RLHQCGLPKKMALELFKPFIYGKLELRGLATTIKAAKKMVEREEAVVWDI LDEVIREHPVLLNRAPTLHRLGIQAFEPVLIEGKAIQLHPLVCAAYNADF DGDQMAVHVPLTLEAQLEARALMMSTNNILSPANGEPIIVPSQDVVLGLY YMTRDCVNAKGEGMVLTGPKEAERLYRSGLASLHARVKVRITEYEKDANG ELVAKTSLKDTTVGRAILWMIVPKGLPYSIVNQALGKKAISKMLNTCYRI LGLKPTVIFADQIMYTGFAYAARSGASVGIDDMVIPEKKHEIISEAEAEV AEIQEQFQSGLVTAGERYNKVIDIWAAANDRVSKAMMDNLQTETVINRDG QEEKQVSFNSIYMMADSGARGSAAQIRQLAGMRGLMAKPDGSIIETPITA NFREGLNVLQYFISTHGARKGLADTALKTANSGYLTRRLVDVAQDLVVTE DDCGTHEGIMMTPVIEGGDVKEPLRDRVLGRVTAEDVLKPGTADILVPRN TLLHEQWCDLLEENSVDAVKVRSVVSCDTDFGVCAHCYGRDLARGHIINK GEAIGVIAAQSIGEPGTQLGGLPRVADLFEARRPKEPAILAEISGIVSFG KETKGKRRLVITPVDGSDPYEEMIPKWRQLNVFEGERVERGDVISDGPEA PHDILRLRGVHAVTRYIVNEVQDVYRLQGVKINDKHIEVIVRQMLRKATI VNAGSSDFLEGEQVEYSRVKIANRELEANGKVGATYSRDLLGITKASLAT ESFISAASFQETTRVLTEAAVAGKRDELRGLKENVIVGRLIPAGTGYAYH QDRMRRRAAG

3D structure PDB 4s20 Structural basis for transcription reactivation by RapA. Chain I Resolution 4.7 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 I R259 F260 A261 T262 D267 K334 L343 R352 T790 A791 R248 F249 A250 T251 D256 K323 L332 R341 T779 A780 BS02 rna I R425 G463 D464 R414 G452 D453 BS03 ZN I K87 C88 K76 C77 BS04 ZN I C814 C888 C898 C803 C877 C887 BS05 MG I D460 D462 D449 D451

Gene Ontology --> -->

UnboundLocalError

Python 3.6.8: /usr/bin/python3 Fri May 23 06:14:01 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/BioLiP2/pdb.cgi in <module>()

1709                 pubmed=display_regular_ligand(pdbid,asym_id,lig3,ligIdx,title)

1710         else:

=> 1711             pubmed,uniprot=display_protein_receptor(pdbid,asym_id,title)

1712

1713     uniprot_line=''

pubmed = '', uniprot = '', display_protein_receptor = <function display_protein_receptor>, pdbid = '4s20', asym_id = 'I', title = 'Structural basis for transcription reactivation by RapA.'

/var/www/html/BioLiP2/pdb.cgi in display_protein_receptor(pdbid='4s20', asym_id='I', title='Structural basis for transcription reactivation by RapA.')

843

844     if go:

=>  845         display_go(go,uniprot,pdbid,asym_id)

846     return pubmed,uniprot

847

global display_go = <function display_go>, go = '0003677,0003899,0006351', uniprot = '', pdbid = '4s20', asym_id = 'I'

/var/www/html/BioLiP2/pdb.cgi in display_go(go='0003677,0003899,0006351', uniprot='', pdbid='4s20', asym_id='I')

484         '''.replace("$namespace_link",namespace_link

485           ).replace("$namespace",namespace

=>  486           ).replace("$uniprot",u

487         ))

488         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>