9I5E | pdb_00009i5e

A Coiled Coil Module Strategy for High-Resolution Cryo-EM Structures of Small Proteins for Drug Discovery

External Resource: Annotation

Domain Annotation: SCOP2 Classification
SAbDab Antibody Annotation
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)
D [auth B]	SCOP2B Superfamily	Ras-like P-loop GTPases	8060856	3002022	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ras-like P-loop GTPases	8060856	3002022	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth M], C [auth N]	Heavy Chain	IGHV1	-	isoform 2b of gtpase kras,aph2	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D [auth B]	PF00071	Ras family (Ras)	Ras family	Includes sub-families Ras, Rab, Rac, Ral, Ran, Rap Ypt1 and more. Shares P-loop motif with GTP_EFTU, arf and myosin_head. See Pfam:PF00009 Pfam:PF00025, Pfam:PF00063. As regards Rab GTPases, these are important regulators of vesicle formation, motili ...	Includes sub-families Ras, Rab, Rac, Ral, Ran, Rap Ypt1 and more. Shares P-loop motif with GTP_EFTU, arf and myosin_head. See Pfam:PF00009 Pfam:PF00025, Pfam:PF00063. As regards Rab GTPases, these are important regulators of vesicle formation, motility and fusion. They share a fold in common with all Ras GTPases: this is a six-stranded beta-sheet surrounded by five alpha-helices [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth M], C [auth N]	Nanobody 26	-	-	-
A, D [auth B]	Isoform 2B of GTPase KRas,APH2	protein-containing complex binding binding LRR domain binding protein binding protein domain specific binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity identical protein binding guanyl nucleotide binding protein-containing complex binding binding LRR domain binding protein binding protein domain specific binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity identical protein binding guanyl nucleotide binding nucleotide binding GMP binding guanyl ribonucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding GTP binding purine ribonucleoside triphosphate binding GDP binding protein-membrane adaptor activity protein-macromolecule adaptor activity molecular adaptor activity G protein activity molecular function regulator activity	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus signal transduction multicellular organismal process cellular developmental process astrocyte differentiation forebrain development cell development glial cell development multicellular organism development neurogenesis astrocyte development gliogenesis cell differentiation anatomical structure development system development developmental process head development forebrain astrocyte development animal organ development brain development nervous system development central nervous system development glial cell differentiation forebrain astrocyte differentiation multicellular organismal-level homeostasis homeostatic process homeostasis of number of cells within a tissue anatomical structure homeostasis tissue homeostasis homeostasis of number of cells myoblast proliferation cell population proliferation heart development heart growth developmental growth cardiac muscle tissue development cardiac muscle cell proliferation growth organ growth tissue development striated muscle tissue development circulatory system development muscle cell proliferation cardiac muscle tissue growth muscle tissue development striated muscle cell proliferation regulation of biosynthetic process positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process response to corticosteroid response to lipid response to hormone response to steroid hormone response to endogenous stimulus response to mineralocorticoid cellular component organization organelle organization actin cytoskeleton organization actin filament-based process cellular component organization or biogenesis cytoskeleton organization skeletal muscle cell differentiation skeletal muscle tissue development muscle structure development skeletal muscle organ development muscle organ development intracellular signal transduction intracellular signaling cassette MAPK cascade regulation of neuronal synaptic plasticity regulation of synaptic plasticity trans-synaptic signaling regulation of signaling regulation of long-term neuronal synaptic plasticity modulation of chemical synaptic transmission cell-cell signaling chemical synaptic transmission synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling regulation of cell communication regulation of biological quality small GTPase-mediated signal transduction Rac protein signal transduction striated muscle cell differentiation muscle cell differentiation response to abiotic stimulus response to gravity hepaticobiliary system development gland development liver development positive regulation of cell communication positive regulation of signal transduction regulation of small GTPase mediated signal transduction regulation of signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction positive regulation of intracellular signal transduction regulation of Rac protein signal transduction positive regulation of Rac protein signal transduction regulation of response to stimulus positive regulation of small GTPase mediated signal transduction positive regulation of signaling epithelium development tube development respiratory tube development lung epithelium development type I pneumocyte differentiation epithelial cell differentiation lung epithelial cell differentiation lung cell differentiation lung development respiratory system development synaptic transmission, GABAergic regulation of synaptic transmission, GABAergic multi-multicellular organism process reproductive process female pregnancy multi-organism reproductive process branching morphogenesis of an epithelial tube tube morphogenesis lung morphogenesis animal organ morphogenesis epithelial tube morphogenesis morphogenesis of an epithelium tissue morphogenesis anatomical structure morphogenesis morphogenesis of a branching structure epithelial tube branching involved in lung morphogenesis morphogenesis of a branching epithelium regulation of developmental process negative regulation of biological process regulation of cell differentiation regulation of epithelial cell differentiation negative regulation of cellular process regulation of multicellular organismal process negative regulation of cell differentiation regulation of multicellular organismal development negative regulation of epithelial cell differentiation negative regulation of developmental process response to light stimulus system process learning learning or memory nervous system process visual learning visual behavior cognition associative learning behavior response to radiation neuron apoptotic process negative regulation of neuron apoptotic process 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 regulation of neuron apoptotic process response to glucocorticoid Ras protein signal transduction regulation of cellular senescence cellular senescence positive regulation of cellular senescence cellular response to stress response to stress response to isolation stress positive regulation of nervous system development positive regulation of cell population proliferation regulation of neurogenesis regulation of gliogenesis positive regulation of glial cell proliferation positive regulation of gliogenesis regulation of cell development regulation of nervous system development positive regulation of developmental process regulation of glial cell proliferation positive regulation of cell differentiation positive regulation of neurogenesis positive regulation of cell development regulation of cell population proliferation positive regulation of multicellular organismal process glial cell proliferation	cellular anatomical structure membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle Golgi membrane Golgi apparatus intracellular membrane-bounded organelle endomembrane system intracellular organelle bounding membrane of organelle organelle organelle membrane cellular anatomical structure membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle Golgi membrane Golgi apparatus intracellular membrane-bounded organelle endomembrane system intracellular organelle bounding membrane of organelle organelle organelle membrane mitochondrial membrane mitochondrion organelle outer membrane organelle envelope mitochondrial envelope mitochondrial outer membrane outer membrane anchoring junction cell junction focal adhesion cell-substrate junction cell periphery plasma membrane organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth B]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, D [auth B]	IPR020849	Small GTPase, Ras-type	Family
A, D [auth B]	IPR005225	Small GTP-binding domain	Domain
A, D [auth B]	IPR001806	Small GTPase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, D [auth B]	Pharos: P01116	Noonan syndrome juvenile myelomonocytic leukemia cardiofaciocutaneous syndrome acute myeloid leukemia gastric cancer cancer Noonan syndrome 3 cholangiocarcinoma Costello syndrome nasopharyngeal carcinoma subependymal giant cell astrocytoma angiosarcoma astrocytic tumor urinary bladder cancer neuroblastoma Noonan syndrome juvenile myelomonocytic leukemia cardiofaciocutaneous syndrome acute myeloid leukemia gastric cancer cancer Noonan syndrome 3 cholangiocarcinoma Costello syndrome nasopharyngeal carcinoma subependymal giant cell astrocytoma angiosarcoma astrocytic tumor urinary bladder cancer neuroblastoma squamous cell carcinoma adenoma cardiofaciocutaneous syndrome 2 ovarian cancer pilocytic astrocytoma non-small cell lung carcinoma endometriosis exocrine pancreatic carcinoma pancreatic ductal adenocarcinoma myelodysplastic syndrome gastric carcinoma papillary adenoma liver cancer colorectal cancer uterine cancer gemistocytic astrocytoma penile neoplasm granular cell carcinoma plasma cell myeloma breast adenocarcinoma nevus, epidermal hereditary diffuse gastric adenocarcinoma adenocarcinoma carcinoma Splenomegaly cecal neoplasm thyroid gland carcinoma anaplastic astrocytoma childhood cerebral astrocytoma autoimmune lymphoproliferative syndrome lung cancer breast cancer protoplasmic astrocytoma malignant colon neoplasm thyroid adenoma cecum cancer fibrillary astrocytoma juvenile pilocytic astrocytoma Toriello-Lacassie-Droste syndrome gallbladder cancer arteriovenous malformations of the brain autoimmune lymphoproliferative syndrome type 4 lung adenocarcinoma prostate cancer breast carcinoma lymphoma sarcomatoid carcinoma intellectual disability intrahepatic cholangiocarcinoma cardiomyopathy familial pancreatic carcinoma juvenile idiopathic arthritis malignant pancreatic neoplasm follicular thyroid adenoma anemia tubular adenocarcinoma microcystic adenoma atypical teratoid rhabdoid tumor B-cell chronic lymphocytic leukemia liver neoplasm congenital anemia uterine disease benign neoplasm of pancreas lung benign neoplasm craniosynostosis hepatocellular carcinoma lung disease breast disease Lynch syndrome digestive system disease encephalocraniocutaneous lipomatosis hydrops fetalis epidermal nevus syndrome oral cavity neoplasm cardiofaciocutaneous syndrome 1 osteosarcoma ovarian disease cerebral astrocytoma pancreatic intraductal papillary-mucinous carcinoma medullary thyroid gland carcinoma pancreatic neoplasm linear nevus sebaceus syndrome colonic neoplasm myopathy gastric neoplasm Parkinson disease colorectal carcinoma glioblastoma benign colon neoplasm Pick disease hematologic disease bile duct cancer cribriform carcinoma dermatomyositis rheumatoid arthritis inflammatory linear verrucous epidermal nevus juvenile dermatomyositis thyroid gland follicular carcinoma ovarian neoplasm cervical carcinoma medulloblastoma pancreatic intraductal papillary-mucinous neoplasm large cell medulloblastoma ulcerative colitis astrocytoma (excluding glioblastoma) pancreatitis colorectal adenocarcinoma urinary bladder neoplasm gastrointestinal stromal tumor penile cancer uterine cervix carcinoma in situ benign neoplasm verrucous nevus bladder transitional cell carcinoma lung carcinoma cribriform carcinoma of breast psoriasis diffuse astrocytoma malignant ependymoma Emery-Dreifuss muscular dystrophy oligodendroglioma squamous cell lung carcinoma osteogenesis imperfecta thyroid cancer amyotrophic lateral sclerosis ovarian carcinoma thyroid gland papillary carcinoma Charcot-Marie-Tooth disease gallbladder neoplasm pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia chronic myelomonocytic leukemia undifferentiated carcinoma

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.