PDB
9PA1
Resolution
2.6 Å
Released
July 1, 2026
Receptor
κ
Class
A
Species
Homo sapiens
Ligand
Function
PHENCYCLIDINE
Agonist (partial)
Reference
10.1038/S41594-026-01839-Y

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Ligand Amino Acid Generic Number Segment Interaction Type
PHENCYCLIDINE L135 3.29x29 TM3 hydrophobic
PHENCYCLIDINE D138 3.32x32 TM3 polar (charge-charge)
PHENCYCLIDINE Y139 3.33x33 TM3 aromatic (edge-to-face)
PHENCYCLIDINE Y139 3.33x33 TM3 hydrophobic
PHENCYCLIDINE M142 3.36x36 TM3 hydrophobic
PHENCYCLIDINE V230 5.42x43 TM5 hydrophobic
PHENCYCLIDINE W287 6.48x48 TM6 hydrophobic
PHENCYCLIDINE I290 6.51x51 TM6 hydrophobic
PHENCYCLIDINE H291 6.52x52 TM6 Van der Waals
PHENCYCLIDINE I294 6.55x55 TM6 hydrophobic
PHENCYCLIDINE Y312 7.35x34 TM7 Van der Waals
PHENCYCLIDINE I316 7.39x38 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
3x32 3.32x32 D138
3x33 3.33x33 Y139
3x36 3.36x36 M142
TM5
5x43 5.42x43 V230
TM6
6x48 6.48x48 W287
6x51 6.51x51 I290
6x52 6.52x52 H291
6x55 6.55x55 I294
TM7
7x34 7.35x34 Y312
7x38 7.39x38 I316