7STG | pdb_00007stg

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
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
Z	AAA	e7stgZ1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
X	AAA	e7stgX1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
V	AAA	e7stgV1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
T	AAA	e7stgT1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
R	AAA	e7stgR1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
P	AAA	e7stgP1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
N	AAA	e7stgN1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
L	AAA	e7stgL1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
J	AAA	e7stgJ1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
H	AAA	e7stgH1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
FA [auth f]	AAA	e7stgf1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
F	AAA	e7stgF1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
DA [auth d]	AAA	e7stgd1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
D	AAA	e7stgD1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
BA [auth b]	AAA	e7stgb1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
B	AAA	e7stgB1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
I	AAA	e7stgI1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
Y	AAA	e7stgY1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
W	AAA	e7stgW1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
U	AAA	e7stgU1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
S	AAA	e7stgS1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
Q	AAA	e7stgQ1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
O	AAA	e7stgO1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
M	AAA	e7stgM1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
K	AAA	e7stgK1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
G	AAA	e7stgG1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
EA [auth e]	AAA	e7stge1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
E	AAA	e7stgE1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
CA [auth c]	AAA	e7stgc1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
C	AAA	e7stgC1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
AA [auth a]	AAA	e7stga1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)
A	AAA	e7stgA1	A: alpha arrays	X: cradle loop barrel	H: Cytochrome P450	T: Cytochrome P450	F: AAA	ECOD (v295)

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	-	rpa-related protein radx peptide,beta-2-microglobulin,mhcclass i antigen chimera	SAbDab (2026-06-26)

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	RPA-related protein RADX peptide,Beta-2-microglobulin,MHC class I antigen chimera	RNA binding binding nucleic acid binding DNA binding single-stranded DNA 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 response to metal ion response to chemical cellular response to stimulus regulation of DNA recombination regulation of cellular process regulation of double-strand break repair regulation of cellular response to stress negative 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 response to metal ion response to chemical cellular response to stimulus regulation of DNA recombination regulation of cellular process regulation of double-strand break repair regulation of cellular response to stress negative regulation of biological process regulation of primary metabolic process negative regulation of DNA repair nucleobase-containing compound metabolic process cellular response to stress response to stress regulation of response to stress negative regulation of double-strand break repair negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process recombinational repair regulation of nucleobase-containing compound metabolic process negative regulation of double-strand break repair via homologous recombination double-strand break repair via homologous recombination DNA repair negative regulation of macromolecule metabolic process double-strand break repair regulation of biological process negative regulation of response to stimulus negative regulation of metabolic process DNA recombination biological regulation primary metabolic process DNA metabolic process regulation of macromolecule metabolic process nucleic acid metabolic process regulation of DNA repair regulation of double-strand break repair via homologous recombination negative regulation of DNA recombination DNA damage response regulation of response to stimulus metabolic process cellular process negative regulation of DNA metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process	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 extracellular region nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular organelle lumen nuclear speck ribonucleoprotein granule nuclear body nucleoplasm organelle lumen membraneless organelle supramolecular complex nuclear ribonucleoprotein granule nuclear lumen replication fork chromosome

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	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
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	IPR040893	RPA-related protein RADX	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	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
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	: Q6NSI4	acute myeloid leukemia B-cell chronic lymphocytic leukemia interstitial cystitis lung cancer malignant mesothelioma pilocytic astrocytoma tuberculosis alcoholic pancreatitis breast cancer large cell medulloblastoma lung carcinoma ovarian cancer psoriasis atypical teratoid rhabdoid tumor cystic fibrosis acute myeloid leukemia B-cell chronic lymphocytic leukemia interstitial cystitis lung cancer malignant mesothelioma pilocytic astrocytoma tuberculosis alcoholic pancreatitis breast cancer large cell medulloblastoma lung carcinoma ovarian cancer psoriasis atypical teratoid rhabdoid tumor cystic fibrosis lung adenocarcinoma malignant ependymoma Pick disease sinusitis

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.