PDB
9KUX
Resolution
3.6 Å
Released
Sept. 17, 2025
Receptor
apelin
Class
A
Species
Homo sapiens
Ligand
cmpd644
Function
Agonist
Reference
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Ligand Amino Acid Generic Number Segment Interaction Type
cmpd644 F78 2.53x53 TM2 hydrophobic
cmpd644 W85 2.60x60 TM2 aromatic (face-to-edge)
cmpd644 I109 3.32x32 TM3 hydrophobic
cmpd644 F110 3.33x33 TM3 hydrophobic
cmpd644 R168 4.64x65 TM4 polar (charge-assisted hydrogen bond)
cmpd644 M183 45.52x52 ECL2 hydrophobic
cmpd644 M183 45.52x52 ECL2 Van der Waals
cmpd644 Y264 6.51x51 TM6 Van der Waals
cmpd644 Y264 6.51x51 TM6 aromatic (edge-to-face)
cmpd644 Y264 6.51x51 TM6 polar (hydrogen bond)
cmpd644 Y271 6.58x58 TM6 Van der Waals
cmpd644 Y271 6.58x58 TM6 aromatic (face-to-face)
cmpd644 F291 7.35x34 TM7 Van der Waals
cmpd644 F291 7.35x34 TM7 hydrophobic
cmpd644 T295 7.39x38 TM7 Van der Waals
cmpd644 Y299 7.43x42 TM7 Van der Waals
cmpd644 Y299 7.43x42 TM7 hydrophobic

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

GPCRdb(A)
GPCRdb(A)
apelin receptor
TM2
2x53 2.53x53 F78
2x60 2.60x60 W85
TM3
3x32 3.32x32 I109
3x33 3.33x33 F110
TM4
4x65 4.64x65 R168
ECL2
45x52 45.52x52 M183
TM6
6x51 6.51x51 Y264
6x58 6.58x58 Y271
TM7
7x34 7.35x34 F291
7x38 7.39x38 T295
7x42 7.43x42 Y299