Annotations: 7RU6

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth L]	Alpha_E2_glycop	e7ru6L01	A: a/b three-layered sandwiches	X: Rossmann-like	H: all-alpha NTP pyrophosphatases	T: Hypothetical protein AF_0060	F: Alpha_E2_glycop	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Heavy Chain	IGHV3	-	serine incorporator 3	SAbDab (2026-04-24)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth L]	SiA	-	-	-
A	Serine incorporator 3	lipid carrier activity transporter activity phospholipid scramblase activity intramembrane lipid carrier activity molecular carrier activity	biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to virus immune system process defense response to other organism response to stress innate immune response antiviral innate immune response biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to virus immune system process defense response to other organism response to stress innate immune response antiviral innate immune response response to external biotic stimulus response to virus oxoacid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process L-serine metabolic process alpha-amino acid metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process metabolic process cellular process small molecule metabolic process membrane organization phospholipid translocation transport biological regulation lipid localization phospholipid transport lipid transport lipid translocation establishment of localization regulation of membrane lipid distribution plasma membrane phospholipid scrambling cellular component organization localization plasma membrane organization macromolecule localization cellular component organization or biogenesis regulation of biological quality endomembrane system organization organophosphate ester transport cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction signaling regulation of cellular response to stress positive regulation of biological process regulation of response to endoplasmic reticulum stress regulation of signal transduction regulation of programmed cell death intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress regulation of intrinsic apoptotic signaling pathway intracellular signal transduction cell communication positive regulation of apoptotic signaling pathway positive regulation of response to stimulus regulation of endoplasmic reticulum stress-induced intrinsic apoptotic signaling pathway positive regulation of response to endoplasmic reticulum stress cellular response to stress regulation of intracellular signal transduction regulation of response to stress signal transduction intrinsic apoptotic signaling pathway positive regulation of cellular process response to endoplasmic reticulum stress regulation of biological process regulation of signaling positive regulation of programmed cell death regulation of apoptotic process positive regulation of intracellular signal transduction cell death positive regulation of apoptotic process apoptotic signaling pathway regulation of response to stimulus regulation of cell communication positive regulation of intrinsic apoptotic signaling pathway positive regulation of endoplasmic reticulum stress-induced intrinsic apoptotic signaling pathway apoptotic process programmed cell death regulation of apoptotic signaling pathway positive regulation of signaling	cellular anatomical structure intracellular anatomical structure perinuclear region of cytoplasm cytoplasm cell periphery plasma membrane membrane membrane-bounded organelle Golgi membrane Golgi apparatus intracellular membrane-bounded organelle endomembrane system intracellular organelle bounding membrane of organelle cellular anatomical structure intracellular anatomical structure perinuclear region of cytoplasm cytoplasm cell periphery plasma membrane membrane membrane-bounded organelle Golgi membrane Golgi apparatus intracellular membrane-bounded organelle endomembrane system intracellular organelle bounding membrane of organelle organelle organelle membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR005016	Serine incorporator/TMS membrane protein	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q13530	prostate cancer astrocytic tumor glioblastoma malignant glioma myopathy plasma cell myeloma Prostatic Neoplasms tuberculosis atypical teratoid rhabdoid tumor large cell medulloblastoma medulloblastoma osteosarcoma primitive neuroectodermal tumor psoriasis ulcerative colitis prostate cancer astrocytic tumor glioblastoma malignant glioma myopathy plasma cell myeloma Prostatic Neoplasms tuberculosis atypical teratoid rhabdoid tumor large cell medulloblastoma medulloblastoma osteosarcoma primitive neuroectodermal tumor psoriasis ulcerative colitis gallbladder disease lung adenocarcinoma metabolic syndrome X ovarian cancer rheumatoid arthritis

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Transmembrane	Alpha-helical polytopic	Serine incorporator (SERINC)	Serine incorporator (SERINC)

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

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.