PDB
9PA4
Resolution
2.5 Å
Released
July 1, 2026
Receptor
κ
Class
A
Species
Homo sapiens
Ligand
ESKETAMINE
Function
Agonist (partial)
Reference
10.1038/S41594-026-01839-Y

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Ligand Amino Acid Generic Number Segment Interaction Type
ESKETAMINE Y139 3.33x33 TM3 hydrophobic
ESKETAMINE M142 3.36x36 TM3 hydrophobic
ESKETAMINE I290 6.51x51 TM6 hydrophobic
ESKETAMINE H291 6.52x52 TM6 aromatic (face-to-edge)
ESKETAMINE I294 6.55x55 TM6 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
3x33 3.33x33 Y139
3x36 3.36x36 M142
TM6
6x51 6.51x51 I290
6x52 6.52x52 H291
6x55 6.55x55 I294