Annotations: 4KRL

Nanobody/VHH domain 7D12 in complex with domain III of the extracellular region of EGFR, pH 6.0

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth A]	d4krla1	Alpha and beta proteins (a/b)	Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)	L domain-like	L domain	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth A]	d4krla2	Small proteins	Knottins (small inhibitors, toxins, lectins)	Growth factor receptor domain	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth A]	d4krla3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth B]	d4krlb_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	llama (Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]		e4krlA1	A: alpha arrays	X: Alpha helical domain of ribonucleotide reductases	H: Alpha helical domain of ribonucleotide reductases	T: Alpha helical domain of ribonucleotide reductases	F:	ECOD (v295.2)
A [auth B]	PNP_UDP_1	e4krlB1	A: alpha arrays	X: beta-propeller-like	H: beta-propeller	T: 6-bladed	F: PNP_UDP_1	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	3.80.20.20	Alpha Beta	Alpha-Beta Horseshoe	24 nucleotide stem-loop, u2 snrnp hairpin iv. U2 a'	Chain A	CATH (4.3.0)
A [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth A]	Epidermal Growth Factor Receptor (EGFR)	EGFR1	Homo sapiens (human)	EGFR*01	R-LIKE-DOMAIN EGFR (Pr28-459)	RPI	EGFR1	IMGT (202640-0)
A [auth B]	Nanobody/VHH domain 7D12	VH	Lama glama (llama)	IGHV3S101, IGHJ401	V-DOMAIN VH	IG	VH	IMGT (202640-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth B]	Heavy Chain	IGHV1	-	epidermal growth factor receptor	SAbDab (2026-10-16)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A]	PF01030	Receptor L domain (Recep_L_domain)	Receptor L domain	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth A]	Epidermal growth factor receptor	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding protein phosphatase binding phosphatase binding enzyme binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding protein phosphatase binding phosphatase binding enzyme binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cell adhesion molecule binding cadherin binding ubiquitin protein ligase binding ubiquitin-like protein ligase binding growth factor binding epidermal growth factor binding hormone binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity protein tyrosine kinase activator activity enzyme regulator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity protein serine/threonine kinase activity MAP kinase kinase kinase activity transmembrane receptor protein tyrosine kinase activity transmembrane receptor protein kinase activity ATPase binding identical protein binding epidermal growth factor receptor activity chromatin binding kinase binding DNA binding double-stranded DNA binding nucleic acid binding	cellular response to stimulus positive regulation of cell communication positive regulation of response to biotic stimulus regulation of toll-like receptor 9 signaling pathway regulation of cellular process positive regulation of signal transduction pattern recognition receptor signaling pathway response to stimulus regulation of signal transduction response to biotic stimulus intracellular signal transduction cell communication immune response-activating signaling pathway positive regulation of immune response cellular response to stimulus positive regulation of cell communication positive regulation of response to biotic stimulus regulation of toll-like receptor 9 signaling pathway regulation of cellular process positive regulation of signal transduction pattern recognition receptor signaling pathway response to stimulus regulation of signal transduction response to biotic stimulus intracellular signal transduction cell communication immune response-activating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process innate immune response-activating signaling pathway regulation of biological process positive regulation of pattern recognition receptor signaling pathway immune response response to other organism regulation of innate immune response response to external stimulus positive regulation of intracellular signal transduction regulation of response to stimulus defense response to other organism regulation of pattern recognition receptor signaling pathway positive regulation of defense response toll-like receptor 9 signaling pathway activation of innate immune response regulation of immune response activation of immune response cytoplasmic pattern recognition receptor signaling pathway regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus intracellular receptor signaling pathway signaling positive regulation of biological process regulation of cytoplasmic pattern recognition receptor signaling pathway positive regulation of response to stimulus endolysosomal toll-like receptor signaling pathway positive regulation of response to external stimulus immune response-regulating signaling pathway regulation of intracellular signal transduction regulation of response to stress response to stress innate immune response response to external biotic stimulus positive regulation of toll-like receptor 9 signaling pathway positive regulation of cellular process regulation of signaling positive regulation of innate immune response defense response biological regulation defense response to symbiont immune system process regulation of cell communication cellular process positive regulation of signaling positive regulation of protein localization to plasma membrane regulation of localization cellular localization regulation of protein localization localization intracellular protein localization regulation of protein localization to membrane positive regulation of protein localization to cell periphery protein localization to cell periphery protein localization to plasma membrane positive regulation of protein localization to membrane regulation of protein localization to cell periphery localization within membrane protein localization to membrane regulation of cellular localization macromolecule localization positive regulation of protein localization regulation of protein localization to plasma membrane positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process regulation of peptidyl-serine phosphorylation positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process peptidyl-serine phosphorylation phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein phosphorylation protein modification process protein phosphorylation phosphorylation regulation of protein metabolic process primary metabolic process regulation of macromolecule metabolic process positive regulation of peptidyl-serine phosphorylation macromolecule modification metabolic process regulation of phosphorylation macromolecule metabolic process regulation of metabolic process negative regulation of signaling negative regulation of ERBB signaling pathway negative regulation of biological process cell surface receptor protein tyrosine kinase signaling pathway negative regulation of cell communication regulation of epidermal growth factor receptor signaling pathway negative regulation of cellular process epidermal growth factor receptor signaling pathway enzyme-linked receptor protein signaling pathway regulation of ERBB signaling pathway cell surface receptor signaling pathway negative regulation of response to stimulus negative regulation of signal transduction negative regulation of epidermal growth factor receptor signaling pathway ERBB signaling pathway regulation of cellular response to stress nucleobase-containing compound metabolic process positive regulation of DNA repair cellular response to stress regulation of nucleobase-containing compound metabolic process DNA repair DNA metabolic process nucleic acid metabolic process regulation of DNA repair positive regulation of DNA metabolic process DNA damage response regulation of DNA metabolic process positive regulation of DNA-templated transcription RNA metabolic process positive regulation of miRNA transcription positive regulation of miRNA metabolic process positive regulation of macromolecule biosynthetic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process miRNA transcription positive regulation of biosynthetic process regulation of miRNA metabolic process miRNA metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process positive regulation of RNA metabolic process regulation of gene expression biosynthetic process positive regulation of RNA biosynthetic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription regulation of miRNA transcription multicellular organismal process ossification ERBB2 signaling pathway ERBB2-EGFR signaling pathway cGAS/STING signaling pathway positive regulation of cGAS/STING signaling pathway regulation of growth regulation of cellular component organization growth positive regulation of cell growth regulation of cell growth cell growth cellular component organization positive regulation of growth cellular component organization or biogenesis positive regulation of ERK1 and ERK2 cascade intracellular signaling cassette positive regulation of MAPK cascade regulation of MAPK cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade negative regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death negative regulation of apoptotic process apoptotic process programmed cell death protein kinase C signaling regulation of protein kinase C signaling positive regulation of protein kinase C signaling developmental process cellular developmental process nervous system development generation of neurons neurogenesis multicellular organism development neuron differentiation cell differentiation anatomical structure development animal gross anatomical part developmental process system development cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of locomotion regulation of cell motility positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration cell migration cell motility locomotion response to lipid response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to chemical stimulus response to chemical cellular response to lipid response to estradiol cellular response to estradiol stimulus membrane organization establishment of protein localization establishment of protein localization to membrane establishment of localization protein insertion into membrane regulation of canonical Wnt signaling pathway canonical Wnt signaling pathway positive regulation of Wnt signaling pathway Wnt signaling pathway positive regulation of canonical Wnt signaling pathway regulation of Wnt signaling pathway cellular response to endogenous stimulus cellular response to growth factor stimulus response to endogenous stimulus cellular response to epidermal growth factor stimulus response to epidermal growth factor response to growth factor regulation of peptidyl-tyrosine phosphorylation peptidyl-tyrosine phosphorylation positive regulation of DNA replication DNA replication regulation of DNA replication regulation of cell cycle phase transition cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle regulation of mitotic cell cycle positive regulation of mitotic cell cycle phase transition positive regulation of cell cycle process positive regulation of mitotic cell cycle cell cycle regulation of cell cycle cell cycle process positive regulation of G1/S transition of mitotic cell cycle regulation of cell cycle process positive regulation of cell cycle regulation of mitotic cell cycle phase transition positive regulation of cell cycle G1/S phase transition mitotic cell cycle process regulation of G1/S transition of mitotic cell cycle positive regulation of cell cycle phase transition G1/S transition of mitotic cell cycle mitotic cell cycle phase transition response to light stimulus response to radiation response to abiotic stimulus response to UV response to UV-A cellular response to acid chemical cellular response to amino acid stimulus response to acid chemical response to amino acid catabolic process macromolecule catabolic process negative regulation of protein catabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process negative regulation of catabolic process negative regulation of metabolic process protein catabolic process regulation of catabolic process regulation of protein catabolic process transcription by RNA polymerase II regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II regulation of developmental process regulation of cell differentiation negative regulation of cell differentiation regulation of multicellular organismal process negative regulation of cardiocyte differentiation heart development negative regulation of developmental process animal organ development cardiocyte differentiation circulatory system development regulation of cardiocyte differentiation negative regulation of multicellular organismal process phosphatidylinositol 3-kinase/protein kinase B signal transduction fibroblast proliferation regulation of fibroblast proliferation positive regulation of fibroblast proliferation macroautophagy autophagy regulation of autophagy negative regulation of macroautophagy regulation of macroautophagy negative regulation of autophagy process utilizing autophagic mechanism positive regulation of epithelial cell proliferation regulation of epithelial cell proliferation epithelial cell proliferation regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction behavior system process learning or memory nervous system process cognition cell adhesion cell-cell adhesion	membrane-bounded organelle intracellular anatomical structure nuclear membrane membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope cellular anatomical structure organelle nuclear envelope organelle membrane intracellular vesicle membrane-bounded organelle intracellular anatomical structure nuclear membrane membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope cellular anatomical structure organelle nuclear envelope organelle membrane intracellular vesicle bounding membrane of organelle cytoplasmic vesicle vesicle membrane clathrin-coated vesicle endocytic vesicle membrane coated vesicle vesicle endocytic vesicle clathrin-coated vesicle membrane clathrin-coated endocytic vesicle membrane clathrin-coated endocytic vesicle cytoplasmic vesicle membrane coated vesicle membrane cytoplasm Golgi membrane Golgi apparatus endosome membrane endosome anchoring junction cell junction focal adhesion cell-substrate junction ruffle cell leading edge plasma membrane leading edge membrane plasma membrane bounded cell projection cell periphery cell projection ruffle membrane plasma membrane region cell projection membrane basal part of cell basal plasma membrane cell surface membrane microdomain membrane raft protein-containing complex organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane extracellular region basolateral plasma membrane perinuclear region of cytoplasm signaling receptor complex Shc-EGFR complex plasma membrane protein complex membrane protein complex multivesicular body, internal vesicle vesicle lumen multivesicular body, internal vesicle lumen endosomal intralumenal vesicle lumen membrane-enclosed lumen endosomal intralumenal vesicle intracellular organelle lumen organelle lumen late endosome multivesicular body early endosome early endosome membrane
A [auth B]	Nanobody/VHH domain 7D12	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A]	IPR016245	Tyrosine protein kinase, EGF/ERB/XmrK receptor	Family
B [auth A]	IPR020635	Tyrosine-protein kinase, catalytic domain	Domain
B [auth A]	IPR000719	Protein kinase domain	Domain
B [auth A]	IPR032778	Growth factor receptor domain 4	Domain
B [auth A]	IPR006212	Furin-like repeat	Repeat
B [auth A]	IPR017441	Protein kinase, ATP binding site	Binding Site
B [auth A]	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
B [auth A]	IPR009030	Growth factor receptor cysteine-rich domain superfamily	Homologous Superfamily
B [auth A]	IPR008266	Tyrosine-protein kinase, active site	Active Site
B [auth A]	IPR036941	Receptor L-domain superfamily	Homologous Superfamily
B [auth A]	IPR049328	Epidermal growth factor receptor-like, transmembrane-juxtamembrane segment	Domain
B [auth A]	IPR000494	Receptor L-domain	Domain
B [auth A]	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
B [auth A]	IPR006211	Furin-like cysteine-rich domain	Domain
B [auth A]	IPR050122	Receptor Tyrosine Kinase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth A]	: P00533	non-small cell lung carcinoma glioblastoma inflammatory skin and bowel disease, neonatal, 2 giant cell glioblastoma osteosarcoma lung cancer cholangiocarcinoma squamous cell carcinoma autosomal recessive polycystic kidney disease dilated cardiomyopathy breast cancer cancer esophageal squamous cell carcinoma classic familial adenomatous polyposis gliosarcoma non-small cell lung carcinoma glioblastoma inflammatory skin and bowel disease, neonatal, 2 giant cell glioblastoma osteosarcoma lung cancer cholangiocarcinoma squamous cell carcinoma autosomal recessive polycystic kidney disease dilated cardiomyopathy breast cancer cancer esophageal squamous cell carcinoma classic familial adenomatous polyposis gliosarcoma breast carcinoma malignant colon neoplasm ovarian cancer papilloma urinary bladder cancer adrenal cortex carcinoma head and neck cancer squamous papilloma head and neck squamous cell carcinoma tubular adenocarcinoma dermatitis prostate cancer Mammary Neoplasms, Experimental adenocarcinoma rectal cancer cervical cancer small cell lung carcinoma colorectal cancer malignant mesothelioma bile duct cancer type 2 diabetes mellitus intrahepatic cholangiocarcinoma gallbladder cancer granular cell carcinoma bile duct carcinoma endometriosis esophageal cancer rectal neoplasm carcinoma sarcomatoid carcinoma nasopharyngeal carcinoma malignant glioma ovarian disease cribriform carcinoma pancreatic ductal adenocarcinoma benign neoplasm of esophagus papillomatosis hepatocellular carcinoma bile duct neoplasm malignant pancreatic neoplasm pituitary cancer brain disease urinary bladder disease endometrial carcinoma acute kidney failure interstitial cystitis uterine disease endometrium adenocarcinoma kidney disease maturity-onset diabetes of the young rheumatoid arthritis laryngeal squamous cell carcinoma carcinoma of esophagus lung benign neoplasm nasopharyngeal neoplasm neoplasm of esophagus gastric cancer lung disease major depressive disorder atypical teratoid rhabdoid tumor squamous cell lung carcinoma Cowden syndrome 1 ovarian neoplasm head and neck carcinoma benign colon neoplasm subependymal giant cell astrocytoma cribriform carcinoma of breast pancreatic neoplasm Pick disease bone disease malignant tumor of nasopharynx dilated cardiomyopathy 1A brain glioma urinary bladder neoplasm ductal breast carcinoma in situ prostate disease endometrium carcinoma in situ rectal carcinoma medulloblastoma esophagus carcinoma in situ adrenal carcinoma sarcoidosis myopathy alcohol abuse small cell carcinoma neoplasm of neck gastric neoplasm spina bifida colonic neoplasm colorectal carcinoma autosomal dominant polycystic kidney disease pancreatic adenocarcinoma head and neck neoplasm benign mesothelioma tongue squamous cell carcinoma cutaneous lupus erythematosus hematologic disease undifferentiated carcinoma digestive system disease pilocytic astrocytoma hereditary diffuse gastric adenocarcinoma bone osteosarcoma malignant tumor of neck prostate adenocarcinoma mammary neoplasms, animal invasive ductal breast carcinoma breast disease large cell medulloblastoma mesothelioma exanthem lung adenocarcinoma gallbladder neoplasm lung carcinoma genetic intestinal polyposis lymphatic system disease colorectal adenocarcinoma oligodendroglioma glioma astrocytic tumor