Descriptions

ACTN2 is a major F-actin cross-linking protein in both muscle and non-muscle cells and a major multivalent platform mediating interactions with many cytoskeletal or regulatory proteins. An interaction between the C-terminal region of ACTN2 and the Z-repeat motifs of Titin protein targets ACTN2 to the Z-disk. Full-length ACTN2 does not bind Z-repeats. ACTN2 has a region that acts as a pseudo-Z-repeat between the actin-binding domain (ABD) and the spectrin-like repeats (R1), and this region prevents ACTN2 from binding to the Z-repeat of Titin protein. This autoinhibition is relieved upon binding of the Z-disk lipid phosphatidylinositol-bisphosphate to the ABD of ACTN2.

Autoinhibitory domains (AIDs)

Target domain

760-912 (EF-hand domain)

Relief mechanism

Ligand binding

Assay

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

1 structures for P57780

Entry ID Method Resolution Chain Position Source
AF-P57780-F1 Predicted AlphaFoldDB

39 variants for P57780

Variant ID(s) Position Change Description Diseaes Association Provenance
rs211928908 16 N>S No EVA
rs3388882546 61 C>F No EVA
rs3388854182 71 Q>* No EVA
rs3388890505 92 I>T No EVA
rs3388898000 108 H>Y No EVA
rs3388892959 134 E>K No EVA
rs3388882614 160 S>T No EVA
rs3397707294 164 T>A No EVA
rs3396932404 164 T>I No EVA
rs3388869739 255 E>K No EVA
rs3507866483 271 G>V No EVA
rs3388900305 310 I>N No EVA
rs3388900306 330 Q>L No EVA
rs3388900322 380 M>K No EVA
rs3397696793 409 L>P No EVA
rs3388896794 421 Q>* No EVA
rs3388896783 434 E>D No EVA
rs3388854179 451 K>N No EVA
rs3397699629 497 Q>L No EVA
rs3388892948 523 Q>H No EVA
rs3388898016 526 T>S No EVA
rs3388900330 560 T>I No EVA
rs3397458099 579 P>S No EVA
rs3397725606 582 D>G No EVA
rs3397677195 584 E>V No EVA
rs3388854028 616 T>A No EVA
rs3388890441 618 Q>H No EVA
rs3388895214 627 V>L No EVA
rs3388900292 644 K>N No EVA
rs3388900356 663 G>W No EVA
rs3388895191 698 I>V No EVA
rs3388895183 699 V>M No EVA
rs3388897957 708 L>M No EVA
rs3388895235 715 I>N No EVA
rs3388890436 740 L>M No EVA
rs3388882544 765 Q>P No EVA
rs3388896763 785 A>E No EVA
rs3388898903 805 D>V No EVA
rs3388898893 807 Q>* No EVA

No associated diseases with P57780

5 regional properties for P57780

Type Name Position InterPro Accession
domain PAS domain 121 - 232 IPR000014-1
domain PAS domain 335 - 402 IPR000014-2
domain Protein kinase domain 999 - 1251 IPR000719
active_site Serine/threonine-protein kinase, active site 1124 - 1136 IPR008271
binding_site Protein kinase, ATP binding site 1005 - 1032 IPR017441

Functions

Description
EC Number
Subcellular Localization
  • Nucleus
  • Cytoplasm
  • Cell junction
  • Cytoplasm, cytoskeleton, stress fiber
  • Cytoplasm, perinuclear region
  • Localized in cytoplasmic mRNP granules containing untranslated mRNAs
  • Expressed in the perinuclear rim and manchette structure in early elongating spermatids during spermiogenesis (PubMed:33228246)
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

16 GO annotations of cellular component

Name Definition
cell junction A cellular component that forms a specialized region of connection between two or more cells, or between a cell and the extracellular matrix, or between two membrane-bound components of a cell, such as flagella.
cell projection A prolongation or process extending from a cell, e.g. a flagellum or axon.
cell-cell junction A cell junction that forms a connection between two or more cells of an organism; excludes direct cytoplasmic intercellular bridges, such as ring canals in insects.
cortical actin cytoskeleton The portion of the actin cytoskeleton, comprising filamentous actin and associated proteins, that lies just beneath the plasma membrane.
cortical cytoskeleton The portion of the cytoskeleton that lies just beneath the plasma membrane.
cytoplasm The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
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).
neuron projection A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.
nucleus A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
perinuclear region of cytoplasm Cytoplasm situated near, or occurring around, the nucleus.
plasma membrane The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
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.
pseudopodium A temporary protrusion or retractile process of a cell, associated with flowing movements of the protoplasm, and serving for locomotion and feeding.
ribonucleoprotein complex A macromolecular complex that contains both RNA and protein molecules.
stress fiber A contractile actin filament bundle that consists of short actin filaments with alternating polarity, cross-linked by alpha-actinin and possibly other actin bundling proteins, and with myosin present in a periodic distribution along the fiber.
Z disc Platelike region of a muscle sarcomere to which the plus ends of actin filaments are attached.

6 GO annotations of molecular function

Name Definition
actin filament binding Binding to an actin filament, also known as F-actin, a helical filamentous polymer of globular G-actin subunits.
calcium ion binding Binding to a calcium ion (Ca2+).
nuclear receptor coactivator activity A transcription coactivator activity that activates or increases the transcription of specific gene sets via binding to a DNA-bound nuclear receptor, either on its own or as part of a complex. Coactivators often act by altering chromatin structure and modifications. For example, one class of transcription coregulators modifies chromatin structure through covalent modification of histones. A second class remodels the conformation of chromatin in an ATP-dependent fashion. A third class modulates interactions of DNA-bound DNA-binding transcription factors with other transcription coregulators. A fourth class of coactivator activity is the bridging of a DNA-binding transcription factor to the general (basal) transcription machinery. The Mediator complex, which bridges sequence-specific DNA binding transcription factors and RNA polymerase, is also a transcription coactivator.
protein-containing complex binding Binding to a macromolecular complex.
structural constituent of cytoskeleton The action of a molecule that contributes to the structural integrity of a cytoskeletal structure.
ubiquitin protein ligase binding Binding to a ubiquitin protein ligase enzyme, any of the E3 proteins.

13 GO annotations of biological process

Name Definition
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.
actin filament bundle assembly The assembly of actin filament bundles; actin filaments are on the same axis but may be oriented with the same or opposite polarities and may be packed with different levels of tightness.
bicellular tight junction assembly The aggregation, arrangement and bonding together of a set of components to form a tight junction, an occluding cell-cell junction that is composed of a branching network of sealing strands that completely encircles the apical end of each cell in an epithelial sheet.
gene expression The process in which a gene's sequence is converted into a mature gene product (protein or RNA). This includes the production of an RNA transcript and its processing, translation and maturation for protein-coding genes.
glomerulus development The progression of the glomerulus over time from its initial formation until its mature state. The glomerulus is a capillary tuft which forms a close network with the visceral epithelium (podocytes) and the mesangium to form the filtration barrier and is surrounded by Bowman's capsule in nephrons of the vertebrate kidney. The glomerulus is part of the nephron and is restricted to one body segment.
muscle cell development The process whose specific outcome is the progression of a muscle cell over time, from its formation to the mature structure. Muscle cell development does not include the steps involved in committing an unspecified cell to the muscle cell fate.
peroxisome proliferator activated receptor signaling pathway The series of molecular signals initiated by binding of a ligand to any of the peroxisome proliferator activated receptors (alpha, beta or gamma) in the nuclear membrane, and ending with the initiation or termination of the transcription of target genes.
podocyte cell migration The orderly movement of a podocyte from one site to another, often during the development of a multicellular organism or multicellular structure. A podocyte is a specialized kidney epithelial cell.
positive regulation of pinocytosis Any process that activates, maintains or increases the rate of pinocytosis. Pinocytosis is the process in which cells take in liquid material from their external environment; literally 'cell drinking'. Liquid is enclosed in vesicles, formed by invagination of the plasma membrane. These vesicles then move into the cell and pass their contents to endosomes.
protein localization to bicellular tight junction A process in which a protein is transported to, or maintained in, a location within a bicellular tight junction.
protein transport The directed movement of proteins into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
regulation of apoptotic process Any process that modulates the occurrence or rate of cell death by apoptotic process.
retinoic acid receptor signaling pathway The series of molecular signals generated as a consequence of a retinoic acid receptor binding to one of its physiological ligands.

19 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
A5D7D1 ACTN4 Alpha-actinin-4 Bos taurus (Bovine) SS
Q0III9 ACTN3 Alpha-actinin-3 Bos taurus (Bovine) SS
Q3B7N2 ACTN1 Alpha-actinin-1 Bos taurus (Bovine) SS
Q3ZC55 ACTN2 Alpha-actinin-2 Bos taurus (Bovine) SS
P05094 ACTN1 Alpha-actinin-1 Gallus gallus (Chicken) SS
P20111 ACTN2 Alpha-actinin-2 Gallus gallus (Chicken) SS
Q90734 ACTN4 Alpha-actinin-4 Gallus gallus (Chicken) SS
P18091 Actn Alpha-actinin, sarcomeric Drosophila melanogaster (Fruit fly) SS
Q08043 ACTN3 Alpha-actinin-3 Homo sapiens (Human) SS
P12814 ACTN1 Alpha-actinin-1 Homo sapiens (Human) SS
P35609 ACTN2 Alpha-actinin-2 Homo sapiens (Human) EV
O43707 ACTN4 Alpha-actinin-4 Homo sapiens (Human) SS
O88990 Actn3 Alpha-actinin-3 Mus musculus (Mouse) SS
Q7TPR4 Actn1 Alpha-actinin-1 Mus musculus (Mouse) SS
Q9JI91 Actn2 Alpha-actinin-2 Mus musculus (Mouse) SS
Q62261 Sptbn1 Spectrin beta chain, non-erythrocytic 1 Mus musculus (Mouse) PR
P15508 Sptb Spectrin beta chain, erythrocytic Mus musculus (Mouse) PR
Q9Z1P2 Actn1 Alpha-actinin-1 Rattus norvegicus (Rat) SS
Q9QXQ0 Actn4 Alpha-actinin-4 Rattus norvegicus (Rat) SS
10 20 30 40 50 60
MVDYHAANQA YQYGPNSGGG NGAGGGGSMG DYMAQEDDWD RDLLLDPAWE KQQRKTFTAW
70 80 90 100 110 120
CNSHLRKAGT QIENIDEDFR DGLKLMLLLE VISGERLPKP ERGKMRVHKI NNVNKALDFI
130 140 150 160 170 180
ASKGVKLVSI GAEEIVDGNA KMTLGMIWTI ILRFAIQDIS VEETSAKEGL LLWCQRKTAP
190 200 210 220 230 240
YKNVNVQNFH ISWKDGLAFN ALIHRHRPEL IEYDKLRKDD PVTNLNNAFE VAEKYLDIPK
250 260 270 280 290 300
MLDAEDIVNT ARPDEKAIMT YVSSFYHAFS GAQKAETAAN RICKVLAVNQ ENEHLMEDYE
310 320 330 340 350 360
RLASDLLEWI RRTIPWLEDR VPQKTIQEMQ QKLEDFRDYR RVHKPPKVQE KCQLEINFNT
370 380 390 400 410 420
LQTKLRLSNR PAFMPSEGRM VSDINNGWQH LEQAEKGYEE WLLNEIRRLE RLDHLAEKFR
430 440 450 460 470 480
QKASIHEAWT DGKEAMLKQR DYETATLSDI KALIRKHEAF ESDLAAHQDR VEQIAAIAQE
490 500 510 520 530 540
LNELDYYDSH NVNTRCQKIC DQWDNLGSLT HSRREALEKT EKQLETIDQL HLEYAKRAAP
550 560 570 580 590 600
FNNWMESAME DLQDMFIVHT IEEIEGLISA HDQFKSTLPD ADREREAILA IHKEAQRIAE
610 620 630 640 650 660
SNHIKLSGSN PYTTVTPQII NSKWEKVQQL VPKRDHALLE EQSKQQSNEH LRRQFASQAN
670 680 690 700 710 720
MVGPWIQTKM EEIGRISIEM NGTLEDQLSH LKQYERSIVD YKPSLDLLEQ QHQLIQEALI
730 740 750 760 770 780
FDNKHTNYTM EHIRVGWEQL LTTIARTINE VENQILTRDA KGISQEQMQE FRASFNHFDK
790 800 810 820 830 840
DHGGALGPEE FKACLISLGY DVENDRQGDA EFNRIMSVVD PNHSGLVTFQ AFIDFMSRET
850 860 870 880 890 900
TDTDTADQVI ASFKVLAGDK NFITAEELRR ELPPDQAEYC IARMAPYQGP DAAPGALDYK
910
SFSTALYGES DL