PDB
9ZZO
Resolution
2.6 Å
Released
June 17, 2026
Receptor
κ
Class
A
Species
Homo sapiens
Ligand
CHEMBL5431513
Function
Agonist
Reference
10.1038/S41467-026-73968-3

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Ligand Amino Acid Generic Number Segment Interaction Type
CHEMBL5431513 L135 3.29x29 TM3 hydrophobic
CHEMBL5431513 Y139 3.33x33 TM3 polar (hydrogen bond)
CHEMBL5431513 Y139 3.33x33 TM3 polar (hydrogen bond)
CHEMBL5431513 M142 3.36x36 TM3 hydrophobic
CHEMBL5431513 M142 3.36x36 TM3 Van der Waals
CHEMBL5431513 C210 45.50x50 ECL2 Van der Waals
CHEMBL5431513 S211 45.51x51 ECL2 Van der Waals
CHEMBL5431513 W287 6.48x48 TM6 hydrophobic
CHEMBL5431513 I290 6.51x51 TM6 Van der Waals
CHEMBL5431513 I290 6.51x51 TM6 hydrophobic
CHEMBL5431513 I294 6.55x55 TM6 hydrophobic
CHEMBL5431513 I294 6.55x55 TM6 Van der Waals
CHEMBL5431513 G319 7.42x41 TM7 Van der Waals
CHEMBL5431513 Y320 7.43x42 TM7 Van der Waals
CHEMBL5431513 Y320 7.43x42 TM7 hydrophobic

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Snake plot — Download: PNG | SVG
ICL1 T K M K ICL1ECL1 S W P F ECL1ICL2 P V K A L D F R ICL2ECL2 G T K V R E D V D V I E C S L Q F P D D ECL2ICL3 R L L S G ICL3ECL3 S T S H ECL3N-term M D S P I Q I F R G E P G P T C A P S A C L P P N S S A W F P G W A E P D S N G S A G S E D A Q L E P A H I S P N-termC-term P L K M R M E R Q S T S R V R N T V Q D P A Y L R D I D G M N K P V C-term A I P V I I T A V Y S V V F V V G L V G N S L V M F V I I R Y T A T N I Y I F N L A L A D A L V T T T M P F Q S T V Y L M N G D V L C K I V I S I D Y Y N M F T S I F T L T M M S V D R Y I A V C H T P L K A K I I N I C I W L L S S S V G I S A I V L G D Y S W W D L F M K I C V F I F A F V I P V L I I I V C Y T L M I L R L K S V S R E K D R N L R R I T R L V L V V V A V F V V C W T P I H I F I L V E A L G S T A A L S S Y Y F C I A L G Y T N S S L N P I L Y A F L D E N F R D F K R C F C F
Helix box plot — Download: PNG | SVG S N G V L G V V F V V S Y V A T I I V P 1 F N L A L A D A L V T T T M P F Q S T V 2 M T L T F I S T F M N Y Y D I S I V I K 3 A K I I N I C I W L L S S S V G I S A I 4 Y C V I I I L V P I V F A F I F V C I K M 5 L V V V A V F V V C W T P I H I F I L V 6 I P N L S S N T Y G L A I C F Y Y S S 7

GPCRdb(A)
GPCRdb(A)
κ receptor
TM3
3x29 3.29x29 I135
3x33 3.33x33 Y139
3x36 3.36x36 M142
ECL2
45x50 45.50x50 C210
45x51 45.51x51 S211
TM6
6x48 6.48x48 W287
6x51 6.51x51 I290
6x55 6.55x55 I294
TM7
7x41 7.42x41 G319
7x42 7.43x42 Y320