μ receptor - Gi1

GPCR CLASS (FAMILY)

Class A (Rhodopsin)

GPCR SPECIES

Homo sapiens

GPCR PREFERRED CHAIN

M

G PROTEIN (FAMILY)

Gi/o

G PROTEIN SPECIES

Homo sapiens

PDB CODE

RESOLUTION

3.0 Å

REFERENCE

PUBLICATION DATE

July 1, 2026

3D VIEW

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LIGAND INTERACTIONS

LIGANDS

PHYSIOLOGICAL LIGANDS

[Met]enkephalin (Human), dynorphin A-(1-8) (Human), dynorphin A (Human), dynorphin A-(1-13) (Human), β-endorphin (Mouse), endomorphin-1 (Human), β-endorphin (Rat), dynorphin B (Human), β-endorphin (Human), [Leu]enkephalin (Human), endomorphin-2 (Human)



GPCR - G protein interface interactions



The biflare plot is a modified version of a flareplot, where lines are drawn between an inner concentric circle (Gα residues) and an outer concentric circle (GPCR residues) depicting the interface interactions.
Different interaction types are shown with different line types (aromatic - solid, hydrophobic - dashed, ionic - long dashed, polar - dotted, Van der Waals - dash-dot).
The interactive features include filtering on interaction type, segments, residues and backbone or sidechain interactions.


Interaction definitions:

Residue numbering:

GPCR-G protein backbone (bb) or sidechain (sc):





Structures

Sequence Color

Gα, Gβ, Gγ, GPCR
Interaction cut-off: strict (stick), loose (line)

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Interaction
type
GPCR
Segment

AA

Number
Generic
number
Gα
segment

AA

Number
Generic
number
Polar ECL2 H 225 - G.hns1 R 32 G.hns1.03
Hydrophobic ECL2 H 225 - G.hns1 R 32 G.hns1.03