Descriptions

(Annotation based on sequence homology with P26038)
MSN is a moesin protein and belongs to the ezrin-radixin-moesin (ERM) protein family, directly involved in the cytoskeleton-membrane crosslinking. Functional N-terminal FERM domain of ERM attaches to the membrane by binding specific membrane proteins while the last 34 residues of the C-terminal tail domain bind actin filaments. The autoinhibitory domain is positions at the C-terminal tail domain of ERM, where FERM domain of ERM is bound tightly via phosphotyrosine binding (PTB), pleckstrin homology (PH), and Enabled/VASP Homology 1 (EVH1) domains, thus masking the binding sites for other molecules. ERM is activated through phosphorylation at Thr558 weakening the FERM/tail binding and, unmasks the binding sites of membrane protein and actin filaments in the presence of phospholipids.

Autoinhibitory domains (AIDs)

Target domain

Relief mechanism

Assay

cis-regPred

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

1 structures for P26042

Entry ID Method Resolution Chain Position Source
AF-P26042-F1 Predicted AlphaFoldDB

No variants for P26042

Variant ID(s) Position Change Description Diseaes Association Provenance
No variants for P26042

No associated diseases with P26042

10 regional properties for P26042

Type Name Position InterPro Accession
domain FERM domain 5 - 295 IPR000299
domain Ezrin/radixin/moesin, C-terminal 502 - 577 IPR011259
domain FERM, N-terminal 9 - 70 IPR018979
domain FERM, C-terminal PH-like domain 210 - 299 IPR018980
conserved_site FERM conserved site 58 - 88 IPR019747-1
conserved_site FERM conserved site 176 - 205 IPR019747-2
domain FERM central domain 91 - 206 IPR019748
domain Band 4.1 domain 1 - 206 IPR019749
domain ERM family, FERM domain C-lobe 200 - 296 IPR041789
domain Ezrin/radixin/moesin, alpha-helical domain 337 - 456 IPR046810

Functions

Description
EC Number
Subcellular Localization
  • Cell membrane ; Peripheral membrane protein ; Cytoplasmic side
  • Cytoplasm, cytoskeleton
  • Apical cell membrane ; Peripheral membrane protein ; Cytoplasmic side
  • Cell projection, microvillus membrane ; Peripheral membrane protein ; Cytoplasmic side
  • Cell projection, microvillus
  • Phosphorylated form is enriched in microvilli-like structures at apical membrane
  • Increased cell membrane localization of both phosphorylated and non-phosphorylated forms seen after thrombin treatment (By similarity)
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

9 GO annotations of cellular component

Name Definition
adherens junction A cell-cell junction composed of the epithelial cadherin-catenin complex. The epithelial cadherins, or E-cadherins, of each interacting cell extend through the plasma membrane into the extracellular space and bind to each other. The E-cadherins bind to catenins on the cytoplasmic side of the membrane, where the E-cadherin-catenin complex binds to cytoskeletal components and regulatory and signaling molecules.
apical part of cell The region of a polarized cell that forms a tip or is distal to a base. For example, in a polarized epithelial cell, the apical region has an exposed surface and lies opposite to the basal lamina that separates the epithelium from other tissue.
apical plasma membrane The region of the plasma membrane located at the apical end of the cell.
cytoplasm The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
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.
filopodium Thin, stiff, actin-based protrusion extended by the leading edge of a motile cell such as a crawling fibroblast or amoeba, or an axonal or dendritic growth cone, or a dendritic shaft.
microvillus Thin cylindrical membrane-covered projections on the surface of an animal cell containing a core bundle of actin filaments. Present in especially large numbers on the absorptive surface of intestinal cells.
microvillus membrane The portion of the plasma membrane surrounding a microvillus.
plasma membrane The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

2 GO annotations of molecular function

Name Definition
actin binding Binding to monomeric or multimeric forms of actin, including actin filaments.
cell adhesion molecule binding Binding to a cell adhesion molecule.

8 GO annotations of biological process

Name Definition
immunological synapse formation The formation of an area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and target cell, which facilitates activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.
positive regulation of early endosome to late endosome transport Any process that activates or increases the frequency, rate or extent of early endosome to late endosome transport.
positive regulation of protein localization to early endosome Any process that activates or increases the frequency, rate or extent of protein localization to early endosome.
regulation of cell shape Any process that modulates the surface configuration of a cell.
regulation of organelle assembly Any process that modulates the frequency, rate or extent of organelle assembly.
T cell aggregation The adhesion of one T cell to one or more other T cells via adhesion molecules.
T cell migration The movement of a T cell within or between different tissues and organs of the body.
T cell proliferation The expansion of a T cell population by cell division. Follows T cell activation.

21 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
Q32LP2 RDX Radixin Bos taurus (Bovine) SS
P31976 EZR Ezrin Bos taurus (Bovine) PR
Q2HJ49 MSN Moesin Bos taurus (Bovine) PR
Q9PU45 RDX Radixin Gallus gallus (Chicken) PR
Q24564 Mer Moesin/ezrin/radixin homolog 2 Drosophila melanogaster (Fruit fly) SS
P46150 Moe Moesin/ezrin/radixin homolog 1 Drosophila melanogaster (Fruit fly) SS
P35240 NF2 Merlin Homo sapiens (Human) EV
P15311 EZR Ezrin Homo sapiens (Human) EV
P35241 RDX Radixin Homo sapiens (Human) SS
Q3KP66 INAVA Innate immunity activator protein Homo sapiens (Human) PR
P26038 MSN Moesin Homo sapiens (Human) EV
P26043 Rdx Radixin Mus musculus (Mouse) SS
A2AD83 Frmd7 FERM domain-containing protein 7 Mus musculus (Mouse) PR
P26040 Ezr Ezrin Mus musculus (Mouse) SS
P46662 Nf2 Merlin Mus musculus (Mouse) SS
P26041 Msn Moesin Mus musculus (Mouse) SS
P26044 RDX Radixin Sus scrofa (Pig) SS
Q63648 Nf2 Merlin Rattus norvegicus (Rat) SS
P31977 Ezr Ezrin Rattus norvegicus (Rat) SS
O35763 Msn Moesin Rattus norvegicus (Rat) SS
Q6Q413 nf2b NF2, moesin-ezrin-radixin-like Danio rerio (Zebrafish) (Brachydanio rerio) SS
10 20 30 40 50 60
MPKTINVRVT TMDAELEFAI QPNTTGKQLF DQVVKTIGLR EVWFFGLQYQ DTKGFSTWLK
70 80 90 100 110 120
LNKKVTAQDV RKESPLLFKF RAKFYPEDVS EELIQDITQR LFFLQVKEGI LNDDIYCPPE
130 140 150 160 170 180
TAVLLASYAV QSKYGDFNKE VHKSGYLAGD KLLPQRVLEQ HKLNKDQWEE RIQVWHEEHR
190 200 210 220 230 240
GMLREDAVLE YLKIAQDLEM YGVNYFSSKN KKGSELWLGV DALGLNIYEQ NDRLTPKIGF
250 260 270 280 290 300
PWSEIRNISF NDKKFVIKPI DKKAPDFVFY APRLRINKRI LALCMGNHEL YMRRRKPDTI
310 320 330 340 350 360
EVQQMKAQAR EEKHQKQMER ALLENEKKKR EMAEKEKEKI EREKEELMER LKQIEEQTKK
370 380 390 400 410 420
AQQELEEQTR RALALEQERK RAQSEAEKLA KERQEAEEAK EALLKASRDQ KKTQEQLALE
430 440 450 460 470 480
MAELTARISQ LEMARQKKES EAAEWQQKAQ MVQEDLEKTR AELKTAMSTP HGAEPAENDQ
490 500 510 520 530 540
DEQDENGAEA SADLRADAMA KDRSEEERTT EAEKNERVQK HLKALTSELA NARDESKKTA
550 560 570
NDMIHAENMR LGRDKYKTLR QIRQGNTKQR IDEFESM