6F2R

A heterotetramer of human HspB2 and HspB3

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
D [auth E]	SCOP2 Family	Alpha crystallin-like	8062168	4005849	SCOP2 (2022-06-29)
D [auth E]	SCOP2 Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2 (2022-06-29)
G [auth I]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
B [auth C]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
F [auth G]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
I [auth K]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
N [auth F]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)
O [auth J]	SCOP2B Superfamily	Hsp20 chaperone-like	8089923	3001242	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Crystallin,HSP20	e6f2rA1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: Crystallin,HSP20	ECOD (1.6)
D [auth E]	HSP20	e6f2rE1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
G [auth I]	HSP20	e6f2rI1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
E [auth T]	HSP20	e6f2rT1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
H [auth V]	HSP20	e6f2rV1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
M [auth Q]	HSP20	e6f2rQ1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
B [auth C]	HSP20	e6f2rC1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
F [auth G]	HSP20	e6f2rG1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
I [auth K]	HSP20	e6f2rK1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
C [auth D]	HSP20	e6f2rD1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
N [auth F]	HSP20	e6f2rF1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)
O [auth J]	HSP20	e6f2rJ1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: HSP20	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth D]	2.60.40.790	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
N [auth F]	2.60.40.790	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
O [auth J]	2.60.40.790	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D [auth E], G [auth I]	PF00011	Hsp20/alpha crystallin family (HSP20)	Hsp20/alpha crystallin family	Not only do small heat-shock-proteins occur in eukaryotes and prokaryotes but they have also now been shown to occur in cyanobacterial phages as well as their bacterial hosts [2].	Domain
B [auth C], F [auth G], I [auth K]	PF00011	Hsp20/alpha crystallin family (HSP20)	Hsp20/alpha crystallin family	Not only do small heat-shock-proteins occur in eukaryotes and prokaryotes but they have also now been shown to occur in cyanobacterial phages as well as their bacterial hosts [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D [auth E], G [auth I]	HspB2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2	enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity unfolded protein binding protein binding binding structural molecule activity structural constituent of eye lens	protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development anatomical structure development regulation of biological process regulation of cellular process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death response to stimulus response to topologically incorrect protein response to stress response to unfolded protein response to heat response to abiotic stimulus response to temperature stimulus	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
E [auth T], H [auth V], M [auth Q]	Heat shock protein beta-3,Heat shock protein beta-3,Heat shock protein beta-3,Heat shock protein beta-3,Heat shock protein beta-2	-	response to stimulus response to topologically incorrect protein response to stress response to unfolded protein	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen cytoplasm
K [auth N]	Unknown peptide from HspB2 or HspB3	-	-	-
L [auth O]	Unknown peptide from HspB2 or HspB3	-	-	-
B [auth C], F [auth G], I [auth K]	HspB2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2,Heat shock protein beta-2	enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity unfolded protein binding protein binding binding structural molecule activity structural constituent of eye lens	protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development anatomical structure development regulation of biological process regulation of cellular process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death response to stimulus response to topologically incorrect protein response to stress response to unfolded protein response to heat response to abiotic stimulus response to temperature stimulus	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
C [auth D], N [auth F], O [auth J]	Heat shock protein beta-2	enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity unfolded protein binding protein binding binding structural molecule activity structural constituent of eye lens	protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development protein refolding primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process muscle structure development developmental process somatic muscle development anatomical structure development regulation of biological process regulation of cellular process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death response to stimulus response to topologically incorrect protein response to stress response to unfolded protein response to heat response to abiotic stimulus response to temperature stimulus	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
J [auth M]	Unknown peptide from HspB2 or HspB3	-	-	-
P [auth 1], Q [auth 2], R [auth 3]	Unknown peptide from HspB2 or HspB3	-	-	-
S [auth W], T [auth X], U [auth Y]	Unknown peptide from HspB2 or HspB3	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth E], G [auth I]	IPR002068	Alpha crystallin/Hsp20 domain	Domain
A, D [auth E], G [auth I]	IPR001436	Alpha crystallin/Small heat shock protein, animal type	Family
A, D [auth E], G [auth I]	IPR003090	Alpha-crystallin, N-terminal	Domain
A, D [auth E], G [auth I]	IPR008978	HSP20-like chaperone	Homologous Superfamily
E [auth T], H [auth V], M [auth Q]	IPR033894	Heat shock protein beta-3	Domain
E [auth T], H [auth V], M [auth Q]	IPR002068	Alpha crystallin/Hsp20 domain	Domain
E [auth T], H [auth V], M [auth Q]	IPR001436	Alpha crystallin/Small heat shock protein, animal type	Family
E [auth T], H [auth V], M [auth Q]	IPR008978	HSP20-like chaperone	Homologous Superfamily
B [auth C], F [auth G], I [auth K]	IPR002068	Alpha crystallin/Hsp20 domain	Domain
B [auth C], F [auth G], I [auth K]	IPR001436	Alpha crystallin/Small heat shock protein, animal type	Family
B [auth C], F [auth G], I [auth K]	IPR003090	Alpha-crystallin, N-terminal	Domain
B [auth C], F [auth G], I [auth K]	IPR008978	HSP20-like chaperone	Homologous Superfamily
C [auth D], N [auth F], O [auth J]	IPR002068	Alpha crystallin/Hsp20 domain	Domain
C [auth D], N [auth F], O [auth J]	IPR001436	Alpha crystallin/Small heat shock protein, animal type	Family
C [auth D], N [auth F], O [auth J]	IPR003090	Alpha-crystallin, N-terminal	Domain
C [auth D], N [auth F], O [auth J]	IPR008978	HSP20-like chaperone	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, D [auth E], G [auth I]	Pharos: Q16082	breast cancer lung adenocarcinoma breast carcinoma psoriasis breast fibroadenoma
E [auth T], H [auth V], M [auth Q]	Pharos: Q12988	neuronopathy, distal hereditary motor, type 2C Charcot-Marie-Tooth disease Spinal muscular atrophy, Jerash type adrenoleukodystrophy cancer malignant ependymoma neurodegenerative disease osteosarcoma pilocytic astrocytoma astrocytic tumor glioblastoma malignant glioma ovarian cancer primitive neuroectodermal tumor atypical teratoid rhabdoid tumor neuronopathy, distal hereditary motor, type 2C Charcot-Marie-Tooth disease Spinal muscular atrophy, Jerash type adrenoleukodystrophy cancer malignant ependymoma neurodegenerative disease osteosarcoma pilocytic astrocytoma astrocytic tumor glioblastoma malignant glioma ovarian cancer primitive neuroectodermal tumor atypical teratoid rhabdoid tumor depressive disorder lung adenocarcinoma medulloblastoma oligodendroglioma peripheral neuropathy
B [auth C], F [auth G], I [auth K]	Pharos: Q16082	breast cancer lung adenocarcinoma breast carcinoma psoriasis breast fibroadenoma
C [auth D], N [auth F], O [auth J]	Pharos: Q16082	breast cancer lung adenocarcinoma breast carcinoma psoriasis breast fibroadenoma

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.