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

2 structures for P36397

Entry ID Method Resolution Chain Position Source
3AQ4 X-ray 180 A A/B 1-181 PDB
AF-P36397-F1 Predicted AlphaFoldDB

2 variants for P36397

Variant ID(s) Position Change Description Diseaes Association Provenance
ENSVATH05733553 120 V>A No 1000Genomes
ENSVATH14623746 142 K>E No 1000Genomes

No associated diseases with P36397

1 regional properties for P36397

Type Name Position InterPro Accession
domain Small GTP-binding protein domain 16 - 157 IPR005225

Functions

Description
EC Number 3.6.5.2 Acting on GTP; involved in cellular and subcellular movement
Subcellular Localization
  • Golgi apparatus
  • Endosome
  • Golgi apparatus, trans-Golgi network
  • Early endosome
  • Colocalizes with AGD5 at trans-Golgi network
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

5 GO annotations of cellular component

Name Definition
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
early endosome A membrane-bounded organelle that receives incoming material from primary endocytic vesicles that have been generated by clathrin-dependent and clathrin-independent endocytosis; vesicles fuse with the early endosome to deliver cargo for sorting into recycling or degradation pathways.
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.
plasma membrane The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
trans-Golgi network The network of interconnected tubular and cisternal structures located within the Golgi apparatus on the side distal to the endoplasmic reticulum, from which secretory vesicles emerge. The trans-Golgi network is important in the later stages of protein secretion where it is thought to play a key role in the sorting and targeting of secreted proteins to the correct destination.

4 GO annotations of molecular function

Name Definition
GTP binding Binding to GTP, guanosine triphosphate.
GTPase activity Catalysis of the reaction
mRNA binding Binding to messenger RNA (mRNA), an intermediate molecule between DNA and protein. mRNA includes UTR and coding sequences, but does not contain introns.
phospholipase activator activity Binds to and increases the activity of a phospholipase, an enzyme that catalyzes of the hydrolysis of a glycerophospholipid.

5 GO annotations of biological process

Name Definition
auxin-activated signaling pathway The series of molecular signals generated by the binding of the plant hormone auxin to a receptor, and ending with modulation of a downstream cellular process, e.g. transcription.
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.
regulation of auxin metabolic process Any process that modulates the frequency, rate or extent of the chemical reactions and pathways involving auxins, plant hormones that regulate aspects of plant growth.
response to brefeldin A Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a brefeldin A stimulus.
vesicle-mediated transport to the plasma membrane The directed movement of substances to the plasma membrane in transport vesicles that fuse with the plasma membrane by exocytosis.

47 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
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
P84081 ARF2 ADP-ribosylation factor 2 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
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
P61204 ARF3 ADP-ribosylation factor 3 Homo sapiens (Human) EV
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
Q9D4P0 Arl5b ADP-ribosylation factor-like protein 5B Mus musculus (Mouse) SS
P61205 Arf3 ADP-ribosylation factor 3 Mus musculus (Mouse) SS
P84078 Arf1 ADP-ribosylation factor 1 Mus musculus (Mouse) SS
Q8BSL7 Arf2 ADP-ribosylation factor 2 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
P84083 Arf5 ADP-ribosylation factor 5 Rattus norvegicus (Rat) SS
P36407 Trim23 E3 ubiquitin-protein ligase TRIM23 Rattus norvegicus (Rat) SS
P61751 Arf4 ADP-ribosylation factor 4 Rattus norvegicus (Rat) SS
P61206 Arf3 ADP-ribosylation factor 3 Rattus norvegicus (Rat) SS
P84079 Arf1 ADP-ribosylation factor 1 Rattus norvegicus (Rat) SS
P84082 Arf2 ADP-ribosylation factor 2 Rattus norvegicus (Rat) SS
Q06396 Os01g0813400 ADP-ribosylation factor 1 Oryza sativa subsp. japonica (Rice) SS
P51823 ARF ADP-ribosylation factor 2 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
P0DH91 ARF2-B ADP-ribosylation factor 2-B Arabidopsis thaliana (Mouse-ear cress) SS
Q9LQC8 ARF2-A ADP-ribosylation factor 2-A Arabidopsis thaliana (Mouse-ear cress) SS
P40940 ARF3 ADP-ribosylation factor 3 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
MGLSFGKLFS RLFAKKEMRI LMVGLDAAGK TTILYKLKLG EIVTTIPTIG FNVETVEYKN
70 80 90 100 110 120
ISFTVWDVGG QDKIRPLWRH YFQNTQGLIF VVDSNDRDRV VEARDELHRM LNEDELRDAV
130 140 150 160 170 180
LLVFANKQDL PNAMNAAEIT DKLGLHSLRQ RHWYIQSTCA TSGEGLYEGL DWLSNNIASK
A