7ST3 | pdb_00007st3

Consequences of HLA single chain trimer mutations on peptide presentation and binding affinity

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	e7st3B1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
BA [auth b]	e7st3b1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
D	e7st3D1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
F	e7st3F1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
H	e7st3H1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
L	e7st3L1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
T	e7st3T1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
V	e7st3V1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
X	e7st3X1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
Z	e7st3Z1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
R	e7st3R1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
P	e7st3P1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
N	e7st3N1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
J	e7st3J1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
FA [auth f]	e7st3f1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
DA [auth d]	e7st3d1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
A	e7st3A1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
AA [auth a]	e7st3a1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
CA [auth c]	e7st3c1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
E	e7st3E1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
G	e7st3G1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
I	e7st3I1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
O	e7st3O1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
Q	e7st3Q1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
U	e7st3U1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
W	e7st3W1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
Y	e7st3Y1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
S	e7st3S1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
M	e7st3M1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
K	e7st3K1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
EA [auth e]	e7st3e1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)
C	e7st3C1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Gal-bind_lectin	F:	ECOD (20:10:01)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, BA [auth b], D, DA [auth d], F, B, BA [auth b], D, DA [auth d], F, FA [auth f], H, J, L, N, P, R, T, V, X, Z	Heavy Chain	IGHV1	-	protein e7 peptide,beta-2-microglobulin,mhc class i antigenchimera	SAbDab (2026-03-13)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, BA [auth b], D, DA [auth d], F, B, BA [auth b], D, DA [auth d], F, FA [auth f], H, J, L, N, P, R, T, V, X, Z	VHH	-	-	-
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	Protein E7 peptide,Beta-2-microglobulin,MHC class I antigen chimera	DNA binding binding nucleic acid binding protein binding protein domain specific binding cation binding transition metal ion binding ion binding cadmium ion binding metal ion binding small molecule binding transcription factor binding DNA-binding transcription factor binding transcription regulator activity DNA binding binding nucleic acid binding protein binding protein domain specific binding cation binding transition metal ion binding ion binding cadmium ion binding metal ion binding small molecule binding transcription factor binding DNA-binding transcription factor binding transcription regulator activity DNA-binding transcription factor activity zinc ion binding	response to stimulus immune response immune system process antigen processing and presentation antigen processing and presentation of peptide antigen via MHC class I antigen processing and presentation of peptide antigen positive regulation of organelle organization regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process positive regulation of cellular component organization regulation of cellular component size positive regulation of biological process response to stimulus immune response immune system process antigen processing and presentation antigen processing and presentation of peptide antigen via MHC class I antigen processing and presentation of peptide antigen positive regulation of organelle organization regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process positive regulation of cellular component organization regulation of cellular component size positive regulation of biological process cellular component organization cellular component biogenesis regulation of protein-containing complex assembly positive regulation of protein-containing complex assembly cellular component assembly positive regulation of protein polymerization protein-containing complex assembly actin filament-based process regulation of actin filament polymerization cellular component organization or biogenesis regulation of biological quality positive regulation of cellular process protein polymerization actin polymerization or depolymerization regulation of biological process regulation of actin filament organization actin cytoskeleton organization actin filament polymerization protein-containing complex organization positive regulation of cellular component biogenesis positive regulation of cytoskeleton organization biological regulation regulation of actin polymerization or depolymerization actin filament organization regulation of cellular component biogenesis positive regulation of supramolecular fiber organization regulation of organelle organization organelle organization regulation of protein polymerization regulation of actin filament length regulation of actin cytoskeleton organization regulation of supramolecular fiber organization cellular process supramolecular fiber organization positive regulation of actin filament polymerization cytoskeleton organization regulation of anatomical structure size viral process symbiont-mediated perturbation of host defense response symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host JAK-STAT cascade symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host IRF9 activity symbiont-mediated perturbation of host immune response biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host signal transduction pathway symbiont-mediated suppression of host immune response symbiont-mediated perturbation of host process symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host innate immune response symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism symbiont-mediated perturbation of host cell cycle progression symbiont-mediated perturbation of host cell cycle G1/S transition checkpoint RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process biosynthetic process metabolic process macromolecule metabolic process symbiont-mediated suppression of host interferon-mediated signaling pathway symbiont-mediated suppression of host type I interferon-mediated signaling pathway symbiont-mediated perturbation of host gene expression symbiont-mediated perturbation of host transcription symbiont-mediated suppression of host apoptosis symbiont-mediated perturbation of host programmed cell death symbiont-mediated suppression of host programmed cell death regulation of killing of cells of another organism disruption of cell in another organism regulation of cell killing symbiont-mediated perturbation of host apoptosis disruption of anatomical structure in another organism killing of cells of another organism cell killing symbiont-mediated suppression of host cGAS-STING signal transduction symbiont-mediated suppression of host pathogen-associated molecular pattern receptor signaling pathway symbiont-mediated suppression of cytoplasmic pattern recognition receptor signaling pathway response to metal ion response to chemical	membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane lumenal side of endoplasmic reticulum membrane intracellular membrane-bounded organelle endomembrane system side of membrane lumenal side of membrane endoplasmic reticulum subcompartment intracellular organelle cellular anatomical structure organelle nuclear outer membrane-endoplasmic reticulum membrane network membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane lumenal side of endoplasmic reticulum membrane intracellular membrane-bounded organelle endomembrane system side of membrane lumenal side of membrane endoplasmic reticulum subcompartment intracellular organelle cellular anatomical structure organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane intracellular vesicle phagocytic vesicle phagocytic vesicle membrane cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane endocytic vesicle membrane vesicle endocytic vesicle endosome membrane endosome recycling endosome recycling endosome membrane Golgi membrane Golgi apparatus early endosome early endosome membrane cell surface MHC class I protein complex MHC protein complex cell periphery protein-containing complex plasma membrane protein complex plasma membrane membrane protein complex transport vesicle transport vesicle membrane coated vesicle membrane COPII-coated ER to Golgi transport vesicle ER to Golgi transport vesicle membrane coated vesicle host intracellular membrane-bounded organelle host cellular component host intracellular part host cell part host intracellular region host cell nucleus other organism part host intracellular organelle host cell cytoplasm extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR050208	Antigen-presenting and immune regulatory MHC class I-related	Family
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR037055	MHC class I-like antigen recognition-like superfamily	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR003597	Immunoglobulin C1-set	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR010579	MHC class I, alpha chain, C-terminal	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR011161	MHC class I-like antigen recognition-like	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR011162	MHC classes I/II-like antigen recognition protein	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR007110	Immunoglobulin-like domain	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR001039	MHC class I alpha chain, alpha1 alpha2 domains	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR000148	Papillomavirus E7	Family
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR003597	Immunoglobulin C1-set	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR015707	Beta-2-Microglobulin	Family
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR007110	Immunoglobulin-like domain	Domain
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR050160	Major Histocompatibility Complex/Immunoglobulin	Family
A, AA [auth a], C, CA [auth c], E, A, AA [auth a], C, CA [auth c], E, EA [auth e], G, I, K, M, O, Q, S, U, W, Y	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site