Structure of PDB 7rqb Chain 20 Binding Site BS01

Receptor Information
>7rqb Chain 20 (length=83) Species: 300852 (Thermus thermophilus HB8) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
AHKKGLGSTRNGRDSQAKRLGVKRYEGQVVRAGNILVRQRGTRFKPGKNV
GMGRDFTLFALVDGVVEFQDRGRLGRYVHVRPL
Ligand information
>7rqb Chain 2A (length=2867) [Search RNA sequence] [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
agaugguaagggcccacgguggaugccucggcacccgagccgaugaagga
cguggcuaccugcgauaagccagggggagccgguagcgggcguggauccc
uggauguccgaaugggggaacccggccggcgggaacgccggucaccgcgc
ugcgcggggggaaccuggggaacugaaacaucucaguacccagaggagag
gaaagagaaaucgacucccugaguagcggcgagcgaaaggggaccagccu
aaaccguccggcuuguccgggcggggucguggggcccucggacaccgaau
ccccagccuagccgaagcuguugggaagcagcgccagagagggugaaagc
cccguaggcgaaagguggggggauaggugaggguacccgaguaccccgug
guucguggagccaugggggaaucugggcggaccaccgccuaaggcuaagu
acuccgggugaccgauagcgcaccaguaccgugagggaaaggugaaaaga
accccgggaggggagugaaauagagccugaaaccgugggcuuacaagcag
ucacggccccggggguuguggcgugccuauugaagcaugagccggcgacu
cacggucgugggcgagcuuaagccguugaggcggaggcguagggaaaccg
aguccgaacagggcgcaagcgcgcaaaguccgcggccguggacccgaaac
cgggcgagcuagcccuggccagggugaagcuggggugagacccaguggag
gcccgaaccggugggggaugcaaaccccucggaugagcuggggcuaggag
ugaaaagcuaaccgagcccggagauagcugguucuccccgaaaugacuuu
agggucagccucaggcgcugacuggggccuguagagcacugauagggcua
gggggcccaccagccuaccaaacccugucaaacuccgaagggucccaggu
ggagccugggagugagggcgcgagcgauaacguccgcguccgagcgcggg
aacaaccgagaccgccagcuaaggcccccaagucugggcuaagugguaaa
ggauguggcgccgcgaagacagccaggagguggcuuagaagcagccaucc
uuuaaagagugcguaauagcucacuggucgaguggcgccgcgccgaaaau
gaucggggcuuaagcccagcgccgaagcugcgggucuggggccccaggcg
guaggggagcguucccgaugccgaugaaggccgacccgcgagggcggcug
gagguaagggaagugcgaaugccggcaugaguaacgauaaagagggugag
aaucccucucgccguaagcccaaggguuccuacgcaauggucgucagcgu
aggguuaggcgggaccuaaggugaagccgaaaggcguagccgaagggcag
ccgguuaauauuccggcccuucccgcaggugcgauggggggacgcucuag
gcuagggggaccggagccauggacgagcccggccagaagcgcaggguggg
agguaggcaaauccgccucccaacaagcucugcgugguggggaagcccgc
gggugacaaccccccgaagccagggagccaagaaaagccucuaagcacaa
ccugcgggaacccguaccgcaaaccgacacaggugggcgggugcaagagc
acucaggcgcgcgggagaacccucgccaaggaacucugcaaguuggcccc
guaacuucgggagaaggggugcucccuggggugaugagccccggggagcc
gcagugaacaggcucuggcgacuguuuaccaaaaacacagcucucugcga
acucguaagaggagguauagggagcgacgcuugcccggugccggaagguc
aaggggaggggugcaagccccgaaccgaagccccggugaacggcggccgu
aacuauaacgguccuaagguagcgaaauuccuugucggguaaguuccgac
cugcacgaaaagcguaacgaccggagcgcugucucggcgagggacccggu
gaaauugaacuggccgugaagaugcggccuacccguggcaggacgaaaag
accccguggagcuuuacugcagccugguguuggcucuuggucgcgccugc
guaggauaggugggagccugugaacccccgccuccgggugggggggaggc
gccggugaaauaccacccuggcgcggcugggggccuaacccucggauggg
gggacagcgcuuggcgggcaguuugacuggggcggucgccuccuaaaagg
uaacggaggcgcccaaagguccccucaggcgggacggaaauccgccggag
agcgcaaggguagaagggggccugacugcgaggccugcaagccgagcagg
ggcgaaagccgggccuagugaaccgguggucccguguggaagggccaucg
aucaacggauaaaaguuaccccggggauaacaggcugaucucccccgagc
guccacagcggcggggagguuuggcaccucgaugucggcucgucgcaucc
uggggcugaagaaggucccaaggguugggcuguucgcccauuaaagcggc
acgcgagcuggguucagaacgucgugagacaguucggucucuauccgcca
cgggcgcaggaggcuugaggggggcucuuccuaguacgagaggaccggaa
gggacgcaccucugguuucccagcugucccuccaggggcauaagcugggu
agccaugugcggaagggauaaccgcugaaagcaucuaagcgggaagcccg
ccccaagaugaggccucccggcagccgguaaggacccgggaagaccaccc
gguggaugggccggggguguaagcgccgcgaggcguugagccgaccgguc
ccaaucguccgaggucu
.<<......<<<<<<<<<<<.....<<..<<<<<<<<<<<<......<<<
<<<.((..((.>>>.....<<<<<<<..<<<))..)).>>>.....>>>>
>>>...>>>....<<<....>>><<<<<<<<....>>>>>>>>.<<<<<<
.>>>>>>.>>...<<<<<<.....<<....>>......>>>>>.>.....
....<<....>>...<<<<<.....<<.....>>....>>>>>...<<<.
...<<<<<<<<.....>>>>>>>>......<<<<<<<<<....<<<...<
<<<<.<<<<.<<<...<<<<<......>>>>>((......<<<.....))
>>>...>>>...>>>>..>>>>>..>>>>>>>>>.>>>.....<<<<<<<
<<.......>>>>>>>>>......<<<<<..((((>>>>>..>>>.....
.>>.>>>>>>.>>...............<<....>>....>>........
.<<<<....>>>>..................>>>>>>>>>>>.......<
<<<<<<<<<<.>>>>>>>>>>>...<............>.<<<<<<....
<<<<<<<<<<<<<..<<<...<<<.....>>>...>>>...<<....>>.
.<<<<.....>>>>....<<..>>...>>>>>>>>>>>>>..<<.<...<
<<<<<....<<<<<<<<<<..<<<....<<<<<<......>>>>>>....
.>>>...<<<..<<<<........>>>>.>>>....>>>>>>>>>>..<<
<.....>>>......>>>>>>......>.>>..<<<<<<....<<<<<..
..>>>>><<<<<<<<<.....<<<<<<<<<...<<<...<<<<<<<<...
<<<<<<......>>>>.>>...>>>>>>>>..>>.>...>>>>>>>>>..
...>>>>>>>.>>..<<<<<<<.<<......>>.>>>>>>>.....<<<.
.....>>>...<<<<.<<<...<<<(((.....<<<<<<...........
<<..<<<<<<<<<........<<<<<.<<<..................>>
>......................>>>>>....>>>>>>>>>.>>......
....)))......>>>>>>.>>>...>>>>>>><<<<<<<..>>>>>>>.
...>>>>>>..<<<<<...<<<......<<<<<.<<<....>>>>>>>>.
..>>>..>>>>>........>>>>>><......<<.....<<<<<<....
...>>>>>><<<<....<<<<<.<<...<<<<<<...<<.....>>.>>>
>>>....((<<<<.<<...<<<...<<<....>>>...>>>...>>...<
<<<<........>>>>>))<<<<<<<<<<<<<...<<<<....<<<<<.<
<<..<<<<<.<<<<.<<..[[[[...>>>>>><<<...<<<<<<<<<<<<
<<<<.<<.....>>>>>>>>>.....>>>>>>>>>..>>><...<<<<..
>>>>.....>>>>>>...>>>..>>>>>.........>>>>...>>...>
>>>>>>>>>>>>>>..>>.....<<......>>>>>>>.<<<<<....>>
>>>..>>>>..<<<<....<<<<<<<<.<<.........<.....<<<<<
.....<..>......>>>>><<<<<<<<<<<<.....>>>>>>>>>>>>.
...........<<<<<<<<<..<<<.........>>>..<<<<<<<....
.<<<....>>>.......>>>>>>>.<<<<<.<<<..<<<<<<<..<<<.
..<<...<<<<<....>>>>>...>>...>>>>>>>>..>>>>><<<<<<
.......>>>>>>........<...........<<<<<<.....>>>>>>
.....>....>>>>>..>>.>>>>>>>..>..>>.>>>>>>>>.>>>>>>
.....>.....<<<<<........>>>>>..<<<<<<<<.<<<.......
..<<<<.<<<<<<..<<<<<.<<<.<<<<<.<<<<<<<<<<<<<<<<...
........<<<<<..<<<.......<<<<<<......>>>>>>....>>>
............>>>>>..>>>>>>>>>>>>>>>>...<<<<<....>>>
>>....>>>>>.>>>..>>>>>..<<<<.....>>>><<<<<<.......
....>>>>>>..<<...<<<<<<<...<<<<<<.......>>>>>>....
.<<...(((>>....>>>>>>>...<<<<..<<<......>>>..>>>>.
<<<....>>>.>>))).......<<<<<<<.<<..))))..>>>>>>>>>
.............>>>>..>>>>>>.......<<<<.<.<<<<<<...<<
.......>>...>>>>>>...>>>>.>.......<<<<<.<<<<<<..<<
<<<<<<<......>>>>>>>..>>.<<<<<.....>>>>>.....>>>>>
..>...>>>.>>....<<<<<<<....>>>.>>>>........>>>>>>>
>>>>....<<<<<<<...<<<<..<<<<<<<...............>>>>
>>>.<<<<<...<<<<...<<<<<<<<<<<]]]]>>>>>>...>>>>>..
.>>>>.>>>>>...<<<....<<<<<...........>>>>>....>>>.
>>>>.......>>>>>>>.<<<.>>>.....<<<<<<<<<.......>>>
>>....<<<<<<<<.<<<....<<<<<....>>>>>...>>>..>>>>>.
>>>...>>>>....>>.
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB7rqb Structural basis for the context-specific action of the classic peptidyl transferase inhibitor chloramphenicol.
Resolution2.45 Å
Binding residue
(original residue number in PDB)
H3 K4 S9 T10 N12 R14 D15 S16 Q17 A18 K19 R20 K24 Y26 E27 Q29 A33 G34 N35 I36 R39 R41 G42 T43 R44 G54 R55 D56 F57 F60 F69 R74 L75 R77
Binding residue
(residue number reindexed from 1)
H2 K3 S8 T9 N11 R13 D14 S15 Q16 A17 K18 R19 K23 Y25 E26 Q28 A32 G33 N34 I35 R38 R40 G41 T42 R43 G53 R54 D55 F56 F59 F68 R73 L74 R76
Enzymatic activity
Enzyme Commision number ?
Gene Ontology
Molecular Function
GO:0003735 structural constituent of ribosome
Biological Process
GO:0006412 translation
Cellular Component
GO:0005840 ribosome
GO:0022625 cytosolic large ribosomal subunit
GO:1990904 ribonucleoprotein complex

View graph for
Molecular Function

View graph for
Biological Process

View graph for
Cellular Component
External links
PDB RCSB:7rqb, PDBe:7rqb, PDBj:7rqb
PDBsum7rqb
PubMed35165455
UniProtP60493|RL27_THET8 Large ribosomal subunit protein bL27 (Gene Name=rpmA)

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