Descriptions

Small GTPases couple their GDP/GTP structural cycle to cytosol/membrane alternation to function as versatile molecular switches in the cell. Membrane localization of their active, GTP-bound form is pivotal to their ability to propagate information, and this requires their post-translational modification by lipids.<br>Arf GTPases are modified by a myristate attached to their N-terminus, which is shielded by intramolecular interactions in their inactive state. The myristoylated N-terminus of Arf is autoinhibitory in solution and is displaced by membranes, priming Arf GTPases for activation by their GEFs. Replacement of the N-terminal myristate by a 6xHis-tag preserves autoinhibition, representing that membranes unlock the N-terminal region to facilitate subsequent activation.

Autoinhibitory domains (AIDs)

Target domain

16-138 (Small GTP-binding protein domain)

Relief mechanism

Ligand binding

Assay

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

3 structures for P84079

Entry ID Method Resolution Chain Position Source
1RRF X-ray 300 A A 1-181 PDB
1RRG X-ray 240 A A/B 1-181 PDB
AF-P84079-F1 Predicted AlphaFoldDB

No variants for P84079

Variant ID(s) Position Change Description Diseaes Association Provenance
No variants for P84079

No associated diseases with P84079

1 regional properties for P84079

Type Name Position InterPro Accession
domain Small GTP-binding protein domain 16 - 140 IPR005225

Functions

Description
EC Number 3.6.5.2 Acting on GTP; involved in cellular and subcellular movement
Subcellular Localization
  • Golgi apparatus membrane ; Lipid-anchor ; Cytoplasmic side
  • Synapse, synaptosome
  • Postsynaptic density
  • In the GDP-bound form, associates transiently with the membranes via its myristoylated N-terminus where guanine nucleotide-exchange factor (GEF)-mediated nucleotide exchange occurs (By similarity)
  • Following nucleotide exchange, the GTP-bound form undergoes a conformational change, leading to the exposure of a myristoylated N-terminal amphipathic helix that provides stable membrane anchorage (By similarity)
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

12 GO annotations of cellular component

Name Definition
cell leading edge The area of a motile cell closest to the direction of movement.
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
endomembrane system A collection of membranous structures involved in transport within the cell. The main components of the endomembrane system are endoplasmic reticulum, Golgi bodies, vesicles, cell membrane and nuclear envelope. Members of the endomembrane system pass materials through each other or though the use of vesicles.
glutamatergic synapse A synapse that uses glutamate as a neurotransmitter.
Golgi apparatus A membrane-bound cytoplasmic organelle of the endomembrane system that further processes the core oligosaccharides (e.g. N-glycans) added to proteins in the endoplasmic reticulum and packages them into membrane-bound vesicles. The Golgi apparatus operates at the intersection of the secretory, lysosomal, and endocytic pathways.
Golgi membrane The lipid bilayer surrounding any of the compartments of the Golgi apparatus.
late endosome A prelysosomal endocytic organelle differentiated from early endosomes by lower lumenal pH and different protein composition. Late endosomes are more spherical than early endosomes and are mostly juxtanuclear, being concentrated near the microtubule organizing center.
neuron projection A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.
plasma membrane The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
postsynaptic density An electron dense network of proteins within and adjacent to the postsynaptic membrane of an asymmetric, neuron-neuron synapse. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
protein-containing complex A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together.
sarcomere The repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs.

6 GO annotations of molecular function

Name Definition
GDP binding Binding to GDP, guanosine 5'-diphosphate.
GTP binding Binding to GTP, guanosine triphosphate.
GTPase activity Catalysis of the reaction
magnesium ion binding Binding to a magnesium (Mg) ion.
phospholipase D activator activity Binds to and increases the activity of the enzyme phospholipase D.
protein domain specific binding Binding to a specific domain of a protein.

22 GO annotations of biological process

Name Definition
actin filament organization A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures comprising actin filaments. Includes processes that control the spatial distribution of actin filaments, such as organizing filaments into meshworks, bundles, or other structures, as by cross-linking.
dendritic spine organization A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of a dendritic spine. A dendritic spine is a specialized protrusion from a neuronal dendrite and is involved in synaptic transmission.
Golgi to transport vesicle transport The directed movement of proteins from the Golgi to a transport vesicle. Continuously secreted proteins are sorted into transport vesicles that fuse with the plasma membrane, releasing their contents by exocytosis.
intracellular copper ion homeostasis A homeostatic process involved in the maintenance of a steady state level of copper ions within a cell.
intracellular protein transport The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.
long-term synaptic depression A process that modulates synaptic plasticity such that synapses are changed resulting in the decrease in the rate, or frequency of synaptic transmission at the synapse.
lysosomal membrane organization A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of a lysosomal membrane. A lysosomal membrane is the lipid bilayer surrounding the lysosome and separating its contents from the cell cytoplasm.
mitotic cleavage furrow ingression Advancement of the mitotic cleavage furrow from the outside of the cell inward towards the center of the cell. The cleavage furrow acts as a 'purse string' which draws tight to separate daughter cells during mitotic cytokinesis and partition the cytoplasm between the two daughter cells. The furrow ingresses until a cytoplasmic bridge is formed.
positive regulation of calcium ion-dependent exocytosis Any process that activates or increases the frequency, rate or extent of calcium ion-dependent exocytosis.
positive regulation of dendritic spine development Any process that increases the rate, frequency, or extent of dendritic spine development, the process whose specific outcome is the progression of the dendritic spine over time, from its formation to the mature structure.
positive regulation of endocytosis Any process that activates or increases the frequency, rate or extent of endocytosis.
positive regulation of ER to Golgi vesicle-mediated transport Any process that activates or increases the frequency, rate or extent of ER to Golgi vesicle-mediated transport.
positive regulation of late endosome to lysosome transport Any process that activates or increases the frequency, rate or extent of late endosome to lysosome transport.
positive regulation of protein secretion Any process that activates or increases the frequency, rate or extent of the controlled release of a protein from a cell.
positive regulation of sodium ion transmembrane transport Any process that activates or increases the frequency, rate or extent of sodium ion transmembrane transport.
postsynaptic actin cytoskeleton organization A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures comprising actin filaments and their associated proteins in the postsynaptic actin cytoskeleton.
regulation of Arp2/3 complex-mediated actin nucleation Any process that modulates the frequency, rate or extent of actin nucleation mediated by the Arp2/3 complex and interacting proteins.
regulation of phospholipid metabolic process Any process that modulates the frequency, rate or extent of phospholipid metabolic process.
regulation of receptor internalization Any process that modulates the frequency, rate or extent of receptor internalization.
synaptic vesicle budding Evagination of a membrane to form a synaptic vesicle.
very-low-density lipoprotein particle assembly The non-covalent aggregation and arrangement of proteins and lipids in the liver to form a very-low-density lipoprotein particle.
vesicle-mediated transport A cellular transport process in which transported substances are moved in membrane-bounded vesicles; transported substances are enclosed in the vesicle lumen or located in the vesicle membrane. The process begins with a step that directs a substance to the forming vesicle, and includes vesicle budding and coating. Vesicles are then targeted to, and fuse with, an acceptor membrane.

48 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
Q2KJ96 ARL5A ADP-ribosylation factor-like protein 5A Bos taurus (Bovine) SS
P84081 ARF2 ADP-ribosylation factor 2 Bos taurus (Bovine) SS
Q3SZF2 ARF4 ADP-ribosylation factor 4 Bos taurus (Bovine) SS
Q0VC18 ARL4D ADP-ribosylation factor-like protein 4D Bos taurus (Bovine) PR
P84080 ARF1 ADP-ribosylation factor 1 Bos taurus (Bovine) SS
Q5E9I6 ARF3 ADP-ribosylation factor 3 Bos taurus (Bovine) SS
P49702 ARF5 ADP-ribosylation factor 5 Gallus gallus (Chicken) SS
P40945 Arf4 ADP ribosylation factor 4 Drosophila melanogaster (Fruit fly) SS
P61209 Arf1 ADP-ribosylation factor 1 Drosophila melanogaster (Fruit fly) SS
P84085 ARF5 ADP-ribosylation factor 5 Homo sapiens (Human) EV
P61204 ARF3 ADP-ribosylation factor 3 Homo sapiens (Human) EV
A6NH57 ARL5C Putative ADP-ribosylation factor-like protein 5C Homo sapiens (Human) SS
Q969Q4 ARL11 ADP-ribosylation factor-like protein 11 Homo sapiens (Human) PR
Q9Y689 ARL5A ADP-ribosylation factor-like protein 5A Homo sapiens (Human) SS
P18085 ARF4 ADP-ribosylation factor 4 Homo sapiens (Human) EV
P49703 ARL4D ADP-ribosylation factor-like protein 4D Homo sapiens (Human) PR
Q8N4G2 ARL14 ADP-ribosylation factor-like protein 14 Homo sapiens (Human) SS
Q9H0F7 ARL6 ADP-ribosylation factor-like protein 6 Homo sapiens (Human) SS
Q96KC2 ARL5B ADP-ribosylation factor-like protein 5B Homo sapiens (Human) SS
Q8IVW1 ARL17A ADP-ribosylation factor-like protein 17 Homo sapiens (Human) SS
P84077 ARF1 ADP-ribosylation factor 1 Homo sapiens (Human) EV
P49076 ARF1 ADP-ribosylation factor Zea mays (Maize) SS
P84084 Arf5 ADP-ribosylation factor 5 Mus musculus (Mouse) SS
P61750 Arf4 ADP-ribosylation factor 4 Mus musculus (Mouse) SS
Q99PE9 Arl4d ADP-ribosylation factor-like protein 4D Mus musculus (Mouse) PR
Q6P068 Arl5c ADP-ribosylation factor-like protein 5C Mus musculus (Mouse) SS
Q80ZU0 Arl5a ADP-ribosylation factor-like protein 5A Mus musculus (Mouse) SS
P61205 Arf3 ADP-ribosylation factor 3 Mus musculus (Mouse) SS
Q9D4P0 Arl5b ADP-ribosylation factor-like protein 5B Mus musculus (Mouse) SS
Q8BSL7 Arf2 ADP-ribosylation factor 2 Mus musculus (Mouse) SS
P84078 Arf1 ADP-ribosylation factor 1 Mus musculus (Mouse) SS
P51824 ADP-ribosylation factor 1 Solanum tuberosum (Potato) SS
P51646 Arl5a ADP-ribosylation factor-like protein 5A Rattus norvegicus (Rat) SS
P61206 Arf3 ADP-ribosylation factor 3 Rattus norvegicus (Rat) SS
P61751 Arf4 ADP-ribosylation factor 4 Rattus norvegicus (Rat) SS
P84082 Arf2 ADP-ribosylation factor 2 Rattus norvegicus (Rat) SS
P84083 Arf5 ADP-ribosylation factor 5 Rattus norvegicus (Rat) SS
P62332 Arf6 ADP-ribosylation factor 6 Rattus norvegicus (Rat) SS
P36407 Trim23 E3 ubiquitin-protein ligase TRIM23 Rattus norvegicus (Rat) SS
P51823 ARF ADP-ribosylation factor 2 Oryza sativa subsp. japonica (Rice) SS
Q06396 Os01g0813400 ADP-ribosylation factor 1 Oryza sativa subsp. japonica (Rice) SS
P34212 arl-5 ADP-ribosylation factor-like protein 5 Caenorhabditis elegans SS
Q10943 arf-1.2 ADP-ribosylation factor 1-like 2 Caenorhabditis elegans SS
P40940 ARF3 ADP-ribosylation factor 3 Arabidopsis thaliana (Mouse-ear cress) SS
P0DH91 ARF2-B ADP-ribosylation factor 2-B Arabidopsis thaliana (Mouse-ear cress) SS
P36397 ARF1 ADP-ribosylation factor 1 Arabidopsis thaliana (Mouse-ear cress) SS
Q9LQC8 ARF2-A ADP-ribosylation factor 2-A Arabidopsis thaliana (Mouse-ear cress) SS
Q5M9P8 arl6 ADP-ribosylation factor-like protein 6 Danio rerio (Zebrafish) (Brachydanio rerio) SS
10 20 30 40 50 60
MGNIFANLFK GLFGKKEMRI LMVGLDAAGK TTILYKLKLG EIVTTIPTIG FNVETVEYKN
70 80 90 100 110 120
ISFTVWDVGG QDKIRPLWRH YFQNTQGLIF VVDSNDRERV NEAREELMRM LAEDELRDAV
130 140 150 160 170 180
LLVFANKQDL PNAMNAAEIT DKLGLHSLRH RNWYIQATCA TSGDGLYEGL DWLSNQLRNQ
K