Annotations: 1Q2H

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1q2ha_	All alpha proteins	Dimerisation interlock	Phenylalanine zipper	Adapter protein APS, dimerisation domain	Adapter protein APS, dimerisation domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1q2hb_	All alpha proteins	Dimerisation interlock	Phenylalanine zipper	Adapter protein APS, dimerisation domain	Adapter protein APS, dimerisation domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d1q2hc_	All alpha proteins	Dimerisation interlock	Phenylalanine zipper	Adapter protein APS, dimerisation domain	Adapter protein APS, dimerisation domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Adapter protein APS dimerisation domain	8026087	4002418	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Phenylalanine zipper	8038466	3001206	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Phenylalanine zipper	8038466	3001206	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Phenylalanine zipper	8038466	3001206	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	Phe_ZIP	e1q2hA1	A: alpha duplicates or obligate multimers	X: Dimerisation interlock	H: Phenylalanine zipper (From Topology)	T: Phenylalanine zipper	F: Phe_ZIP	ECOD (1.6)
B	Phe_ZIP	e1q2hB1	A: alpha duplicates or obligate multimers	X: Dimerisation interlock	H: Phenylalanine zipper (From Topology)	T: Phenylalanine zipper	F: Phe_ZIP	ECOD (1.6)
C	Phe_ZIP	e1q2hC1	A: alpha duplicates or obligate multimers	X: Dimerisation interlock	H: Phenylalanine zipper (From Topology)	T: Phenylalanine zipper	F: Phe_ZIP	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.10.140.110	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
B	6.10.140.110	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
C	6.10.140.110	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF08916	Phenylalanine zipper (Phe_ZIP)	Phenylalanine zipper	The phenylalanine zipper consists of aromatic side chains from ten phenylalanine residues that are stacked within a hydrophobic core. This zipper mediates dimerisation of various proteins, such as APS and SH2-B/Lnk [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	adaptor protein with pleckstrin homology and src homology 2 domains	transmembrane receptor protein tyrosine kinase adaptor activity protein tyrosine kinase binding binding signaling receptor binding receptor tyrosine kinase binding enzyme binding protein kinase binding molecular adaptor activity signaling adaptor activity protein binding signaling receptor complex adaptor activity kinase binding protein-macromolecule adaptor activity SH2 domain binding transmembrane receptor protein tyrosine kinase adaptor activity protein tyrosine kinase binding binding signaling receptor binding receptor tyrosine kinase binding enzyme binding protein kinase binding molecular adaptor activity signaling adaptor activity protein binding signaling receptor complex adaptor activity kinase binding protein-macromolecule adaptor activity SH2 domain binding protein domain specific binding identical protein binding	cellular response to stimulus response to organic substance regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication cellular response to chemical stimulus response to chemical cellular response to cytokine stimulus cellular response to stimulus response to organic substance regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication cellular response to chemical stimulus response to chemical cellular response to cytokine stimulus cellular process cellular response to organic substance signal transduction immune response-regulating cell surface receptor signaling pathway positive regulation of biological process positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process positive regulation of immune system process immune response-activating cell surface receptor signaling pathway immune response B cell receptor signaling pathway regulation of response to stimulus immune system process regulation of immune response antigen receptor-mediated signaling pathway activation of immune response regulation of signaling small GTPase-mediated signal transduction regulation of small GTPase mediated signal transduction Ras protein signal transduction regulation of signal transduction intracellular signal transduction regulation of intracellular signal transduction regulation of Ras protein signal transduction intracellular signaling cassette regulation of cell communication cellular component organization organelle organization actin cytoskeleton organization actin filament-based process cellular component organization or biogenesis cytoskeleton organization metabolic process regulation of metabolic process cellular response to nitrogen compound response to peptide hormone insulin receptor signaling pathway cell surface receptor protein tyrosine kinase signaling pathway cellular response to endogenous stimulus response to hormone enzyme-linked receptor protein signaling pathway cellular response to hormone stimulus response to endogenous stimulus response to organonitrogen compound response to oxygen-containing compound cellular response to peptide hormone stimulus response to nitrogen compound cellular response to oxygen-containing compound cellular response to organonitrogen compound response to insulin cellular response to insulin stimulus developmental process multicellular organism development multicellular organismal process anatomical structure development nervous system development system development fat cell differentiation cellular developmental process brown fat cell differentiation cell differentiation B cell homeostasis multicellular organismal-level homeostasis leukocyte homeostasis homeostatic process B-1 B cell homeostasis homeostasis of number of cells lymphocyte homeostasis	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane ruffle cell projection cell leading edge plasma membrane bounded cell projection actin filament bundle actin cytoskeleton actomyosin intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane ruffle cell projection cell leading edge plasma membrane bounded cell projection actin filament bundle actin cytoskeleton actomyosin intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle stress fiber contractile actin filament bundle non-membrane-bounded organelle polymeric cytoskeletal fiber actin filament supramolecular fiber supramolecular polymer supramolecular complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR001849	Pleckstrin homology domain	Domain
A, B, C	IPR015012	Phenylalanine zipper	Domain
A, B, C	IPR036860	SH2 domain superfamily	Homologous Superfamily
A, B, C	IPR000980	SH2 domain	Domain
A, B, C	IPR011993	PH-like domain superfamily	Homologous Superfamily
A, B, C	IPR035058	SH2B2, SH2 domain	Domain
A, B, C	IPR036290	Phenylalanine zipper superfamily	Homologous Superfamily
A, B, C	IPR030523	SH2B adapter protein	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C	Pharos: O14492	astrocytic tumor large cell medulloblastoma medulloblastoma pancreatic ductal adenocarcinoma attention deficit hyperactivity disorder, inattentive type malignant ependymoma oligodendroglioma primitive neuroectodermal tumor glioblastoma malignant glioma osteosarcoma psoriasis

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.