Descriptions

RIAM is a multidomain scaffold protein that is regulated by recruitment from the cytosol to the plasma membrane. RIAM is autoinhibited by an intramolecular interaction between the inhibitory segment (IN) region and the RAS-association (RA) region, which inhibits its association with RAP1. Phosphorylation of Tyr45 in the IN segment by focal adhesion kinase (FAK) releases this autoinhibition, facilitating translocation to the plasma membrane and enhancing integrin-mediated cell adhesion.

Autoinhibitory domains (AIDs)

Target domain

179-266 (RAS-association (RA) region)

Relief mechanism

PTM

Assay

Deletion assay, Mutagenesis experiment, Structural analysis

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

7 structures for Q8R5A3

Entry ID Method Resolution Chain Position Source
3TCA X-ray 235 A A/B 150-437 PDB
4KVG X-ray 165 A B/D 179-437 PDB
4W8P X-ray 150 A B 5-25 PDB
6O6H X-ray 250 A A 150-437 PDB
6OLU X-ray 190 A A 179-437 PDB
7V1A X-ray 184 A B 7-25 PDB
AF-Q8R5A3-F1 Predicted AlphaFoldDB

31 variants for Q8R5A3

Variant ID(s) Position Change Description Diseaes Association Provenance
rs3388526397 71 L>M No EVA
rs27140001 81 R>K No EVA
rs215594610 95 R>H No EVA
rs241842089 98 L>F No EVA
rs260709083 104 G>D No EVA
rs3412972306 120 D>V No EVA
rs242054098 127 A>D No EVA
rs3540187453 161 A>T No EVA
rs3388530311 167 K>E No EVA
rs3388530334 214 T>I No EVA
rs3388532782 216 C>Y No EVA
rs3388529927 217 D>E No EVA
rs3388527429 384 C>Y No EVA
rs3388526415 391 Q>R No EVA
rs3388530329 405 D>N No EVA
rs254847658 461 S>P No EVA
rs3388530888 473 G>A No EVA
rs3388533348 499 E>G No EVA
rs3388530270 521 L>M No EVA
rs258470808 528 V>I No EVA
rs1133342649 530 R>L No EVA
rs3388530928 539 A>D No EVA
rs228026487 549 T>A No EVA
rs228026487 549 T>P No EVA
rs254367825 549 T>S No EVA
rs3540175707 554 H>P No EVA
rs3388534267 555 P>L No EVA
rs3388532465 556 P>Q No EVA
rs3388533409 565 P>S No EVA
rs3391372460 633 V>A No EVA
rs254912945 669 I>M No EVA

No associated diseases with Q8R5A3

3 regional properties for Q8R5A3

Type Name Position InterPro Accession
domain Ras-associating domain 179 - 266 IPR000159
domain Pleckstrin homology domain 313 - 424 IPR001849
domain APBB1IP, PH domain 310 - 431 IPR039665

Functions

Description
EC Number
Subcellular Localization
  • Cell membrane ; Peripheral membrane protein
  • Cell projection, lamellipodium
  • Cell junction, focal adhesion
  • Cytoplasm, cytoskeleton
  • Colocalizes with ENA/VASP proteins at lamellipodia tips and focal adhesions, and F-actin at the leading edge
  • At the membrane surface, associates, via the PH domain, preferentially with the inositol phosphates, PtdIns(5)P and PtdIns(3)P
  • This binding appears to be necessary for the efficient interaction of the RA domain to Ras-GTPases
PANTHER Family PTHR11243 GROWTH FACTOR RECEPTOR-BOUND PROTEIN
PANTHER Subfamily PTHR11243:SF14 AMYLOID BETA A4 PRECURSOR PROTEIN-BINDING FAMILY B MEMBER 1-INTERACTING PROTEIN
PANTHER Protein Class scaffold/adaptor protein
PANTHER Pathway Category No pathway information available

6 GO annotations of cellular component

Name Definition
cytoskeleton A cellular structure that forms the internal framework of eukaryotic and prokaryotic cells. The cytoskeleton includes intermediate filaments, microfilaments, microtubules, the microtrabecular lattice, and other structures characterized by a polymeric filamentous nature and long-range order within the cell. The various elements of the cytoskeleton not only serve in the maintenance of cellular shape but also have roles in other cellular functions, including cellular movement, cell division, endocytosis, and movement of organelles.
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
focal adhesion A cell-substrate junction that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments. In insects focal adhesion has also been referred to as hemi-adherens junction (HAJ).
lamellipodium A thin sheetlike process extended by the leading edge of a migrating cell or extending cell process; contains a dense meshwork of actin filaments.
plasma membrane The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
T cell receptor complex A protein complex that contains a disulfide-linked heterodimer of T cell receptor (TCR) chains, which are members of the immunoglobulin superfamily, and mediates antigen recognition, ultimately resulting in T cell activation. The TCR heterodimer is associated with the CD3 complex, which consists of the nonpolymorphic polypeptides gamma, delta, epsilon, zeta, and, in some cases, eta (an RNA splice variant of zeta) or Fc epsilon chains.

No GO annotations of molecular function

Name Definition
No GO annotations for molecular function

3 GO annotations of biological process

Name Definition
positive regulation of cell adhesion Any process that activates or increases the frequency, rate or extent of cell adhesion.
signal transduction The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
T cell activation via T cell receptor contact with antigen bound to MHC molecule on antigen presenting cell The change in morphology and behavior of a mature or immature T cell resulting from exposure to an antigen for which its T cell receptor is specific bound to an MHC molecule on an antigen presenting cell, leading to the initiation or perpetuation of an immune response.

3 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
Q5ZL23 APBB1IP Amyloid beta A4 precursor protein-binding family B member 1-interacting protein Gallus gallus (Chicken) SS
Q7Z5R6 APBB1IP Amyloid beta A4 precursor protein-binding family B member 1-interacting protein Homo sapiens (Human) SS
Q6PFT9 apbb1ip Amyloid beta A4 precursor protein-binding family B member 1-interacting protein Danio rerio (Zebrafish) (Brachydanio rerio) SS
10 20 30 40 50 60
MGESNEDIDQ MFSTLLGEMD LLTQSLGVDT LPPPDPNPPR EEFNYTVGFK DLNESLNALE
70 80 90 100 110 120
DQDLDALMAD LVADISEAEQ RTIQAQKESS QNQDRFALLR ASDGQGTASG GYGASAAAID
130 140 150 160 170 180
VSHHEEALPP PPVEPMLDLL PPPPPPPPPE LLSKEEEEAK AKADKIKLAL EKLKEAKVKK
190 200 210 220 230 240
LVVKVHMDDS STKSLMVDER QLARDVLDNL FEKTHCDCNV DWCLYEIYPE LQIERVFEDH
250 260 270 280 290 300
ENVVEVLSDW TRDTENKVLF LEKEERYAVF KNPQNFYLDN KGKKENKETN EKMNAKNKEY
310 320 330 340 350 360
LLEESFCGTS IIVPELEGAL YLKEDGKKSW KRRYFLLRAS GIYYVPKGKT KTSRDLACFI
370 380 390 400 410 420
QFENVNIYYG IQCKMKYKAP TDHCFVLKHP QIQKESQYIK YLCCDDARTL SQWVMGIRIA
430 440 450 460 470 480
KYGKTLYDNY QRAVARAGLA SRWTNLGTVG TPMPAQPSTV SSGLKTGTSQ PNGQMPQAIP
490 500 510 520 530 540
SAGPPLQEAQ TQIETTKDEK QGLGNHSPGA TRENHRPKSS LPPPPPPVRR SSDTCGSPAL
550 560 570 580 590 600
PSKVKGPGTC TFPHPPENFL PPPPPPPPEE DNSGLLPPPP PPPYLEEPPD FVPPPPPPAA
610 620 630 640 650 660
VEDSALPPPP PPPPCLSQEI TKSSPLPPKK PLVPPKRQEN QGLPGAPGNS EQDFMSDLMK
ALQKKRGNIP