Descriptions

(Annotation based on sequence homology with P63328)
Calcium-dependent, calmodulin-stimulated protein phosphatase calcineurin (CN) plays a role in the transduction of intracellular Ca2+-dependent signals. CN is a heterodimer composed of a catalytic subunit A (CNA) and an essential regulatory subunit B (CNB).
CNA contains two autoinhibitory regions, which interfere with the function of the catalytic domain: autoinhibitory segment (AIS) and autoinhibitory domain (AID). The AIS interacts with a hydrophobic intersubunit groove formed at the junction of CNA and CNB, and disruption of the AIS interaction results in partial stimulation of CN activity. In addition, the binding partner calmodulin regulates the orientation of AID with respect to the catalytic core, resulting in incomplete activation of CN.

Autoinhibitory domains (AIDs)

Target domain

Relief mechanism

Assay

cis-regPred

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

1 structures for P48455

Entry ID Method Resolution Chain Position Source
AF-P48455-F1 Predicted AlphaFoldDB

27 variants for P48455

Variant ID(s) Position Change Description Diseaes Association Provenance
rs3389312834 41 L>I No EVA
rs3389351559 55 E>G No EVA
rs3389343600 68 L>M No EVA
rs13463775 99 E>G No EVA
rs3389329989 140 L>V No EVA
rs3389330063 149 C>S No EVA
rs3389348329 166 Y>C No EVA
rs3389348383 170 V>M No EVA
rs3389338222 193 C>Y No EVA
rs3389343596 204 C>* No EVA
rs3404479796 227 L>P No EVA
rs3405335154 228 W>* No EVA
rs3404479773 235 Y>* No EVA
rs3405246670 243 H>Q No EVA
rs3389338317 265 L>* No EVA
rs3389329995 275 R>I No EVA
rs3389336339 282 A>V No EVA
rs1133277860 300 T>M No EVA
rs250940036 374 N>S No EVA
rs3404545559 377 D>E No EVA
rs3405012218 378 E>* No EVA
rs3405547204 402 V>I No EVA
rs3404479762 446 E>P No EVA
rs219281028 447 E>D No EVA
rs3389323677 485 H>R No EVA
rs3389336305 487 D>E No EVA
rs260023365 500 P>S No EVA

No associated diseases with P48455

3 regional properties for P48455

Type Name Position InterPro Accession
domain Calcineurin-like phosphoesterase domain, ApaH type 80 - 280 IPR004843
domain Serine/threonine-specific protein phosphatase/bis(5-nucleosyl)-tetraphosphatase 52 - 343 IPR006186
domain PP2B, metallophosphatase domain 37 - 341 IPR041751

Functions

Description
EC Number 3.1.3.16 Phosphoric monoester hydrolases
Subcellular Localization
  • Mitochondrion
  • Localizes in the mitochondria in a SPATA33-dependent manner
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

11 GO annotations of cellular component

Name Definition
calcineurin complex A heterodimeric calcium ion and calmodulin dependent protein phosphatase composed of catalytic and regulatory subunits; the regulatory subunit is very similar in sequence to calmodulin.
cytoplasm The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
glutamatergic synapse A synapse that uses glutamate as a neurotransmitter.
mitochondrion A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
presynapse The part of a synapse that is part of the presynaptic cell.
presynaptic cytosol The region of the cytosol consisting of all cytosol that is part of the presynapse.
protein serine/threonine phosphatase complex A complex, normally consisting of a catalytic and a regulatory subunit, which catalyzes the removal of a phosphate group from a serine or threonine residue of a protein.
sperm flagellum A microtubule-based flagellum (or cilium) that is part of a sperm, a mature male germ cell that develops from a spermatid.
sperm midpiece The highly organized segment of the sperm flagellum which begins at the connecting piece and is characterized by the presence of 9 outer dense fibers (ODFs) that lie outside each of the 9 outer axonemal microtubule doublets and by a sheath of mitochondria that encloses the ODFs and the axoneme; the midpiece terminates about one-fourth of the way down the sperm flagellum at the annulus, which marks the beginning of the principal piece.
sperm mitochondrial sheath The tightly packed helical sheath of ATP-producing mitochondria restricted to the midpiece of the sperm flagellum.

5 GO annotations of molecular function

Name Definition
calcium-dependent protein serine/threonine phosphatase activity Catalysis of the reactions: protein serine phosphate + H2O = protein serine + phosphate; and protein threonine phosphate + H2O = protein threonine + phosphate. These reactions require the presence of calcium ions.
calmodulin binding Binding to calmodulin, a calcium-binding protein with many roles, both in the calcium-bound and calcium-free states.
calmodulin-dependent protein phosphatase activity Catalysis of the reaction: protein serine/threonine phosphate + H2O = protein serine/threonine + phosphate, dependent on the presence of calcium-bound calmodulin.
metal ion binding Binding to a metal ion.
myosin phosphatase activity Catalysis of the reaction: phosphomyosin + H2O = myosin + phosphate.

11 GO annotations of biological process

Name Definition
calcineurin-mediated signaling Any intracellular signal transduction in which the signal is passed on within the cell by activation of a transcription factor as a consequence of dephosphorylation by Ca(2+)-activated calcineurin. The process begins with calcium-dependent activation of the phosphatase calcineurin. Calcineurin is a calcium- and calmodulin-dependent serine/threonine protein phosphatase with a conserved function in eukaryotic species from yeast to humans. In yeast and fungi, calcineurin regulates stress signaling and cell cycle, and sporulation and virulence in pathogenic fungi. In metazoans, calcineurin is involved in cell commitment, organogenesis and organ development and immune function of T-lymphocytes. By a conserved mechanism, calcineurin phosphatase activates fungal Crz1 and mammalian NFATc by dephosphorylation and translocation of these transcription factors to the nucleus to regulate gene expression.
calcineurin-NFAT signaling cascade Any intracellular signal transduction in which the signal is passed on within the cell by activation of a member of the NFAT protein family as a consequence of NFAT dephosphorylation by Ca(2+)-activated calcineurin. The cascade begins with calcium-dependent activation of the phosphatase calcineurin. Calcineurin dephosphorylates multiple phosphoserine residues on NFAT, resulting in the translocation of NFAT to the nucleus. The cascade ends with regulation of transcription by NFAT. The calcineurin-NFAT cascade lies downstream of many cell surface receptors, including G protein-coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs) that signal to mobilize calcium ions (Ca2+).
negative regulation of calcium ion import across plasma membrane Any process that stops, prevents or reduces the frequency, rate or extent of calcium ion import across plasma membrane.
negative regulation of voltage-gated calcium channel activity Any process that stops, prevents or reduces the frequency, rate or extent of voltage-gated calcium channel activity.
penetration of zona pellucida The infiltration by sperm of the zona pellucida to reach the oocyte. The process involves digestive enzymes from a modified lysosome called the acrosome, situated at the head of the sperm.
positive regulation of calcineurin-NFAT signaling cascade Any process that activates or increases the frequency, rate or extent of signaling via the calcineurin-NFAT signaling cascade.
positive regulation of calcium ion import across plasma membrane Any process that activates or increases the frequency, rate or extent of calcium ion import across plasma membrane.
positive regulation of synaptic vesicle endocytosis Any process that activates or increases the frequency, rate or extent of synaptic vesicle endocytosis.
positive regulation of voltage-gated calcium channel activity Any process that activates or increases the frequency, rate or extent of voltage-gated calcium channel activity.
protein dephosphorylation The process of removing one or more phosphoric residues from a protein.
regulation of synaptic vesicle endocytosis Any process that modulates the frequency, rate or extent of synaptic vesicle endocytosis.

13 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
P23287 CNA1 Serine/threonine-protein phosphatase 2B catalytic subunit A1 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast) PR
P48452 PPP3CA Protein phosphatase 3 catalytic subunit alpha Bos taurus (Bovine) SS
P48456 CanA1 Serine/threonine-protein phosphatase 2B catalytic subunit 1 Drosophila melanogaster (Fruit fly) SS
Q27889 Pp2B-14D Serine/threonine-protein phosphatase 2B catalytic subunit 2 Drosophila melanogaster (Fruit fly) SS
Q9VXF1 CanA-14F Serine/threonine-protein phosphatase 2B catalytic subunit 3 Drosophila melanogaster (Fruit fly) SS
P16298 PPP3CB Serine/threonine-protein phosphatase 2B catalytic subunit beta isoform Homo sapiens (Human) EV
Q08209 PPP3CA Serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform Homo sapiens (Human) EV
P48454 PPP3CC Serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform Homo sapiens (Human) SS
P48453 Ppp3cb Serine/threonine-protein phosphatase 2B catalytic subunit beta isoform Mus musculus (Mouse) SS
P63328 Ppp3ca Serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform Mus musculus (Mouse) EV
P20651 Ppp3cb Serine/threonine-protein phosphatase 2B catalytic subunit beta isoform Rattus norvegicus (Rat) SS
P63329 Ppp3ca Serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform Rattus norvegicus (Rat) SS
Q0G819 tax-6 Serine/threonine-protein phosphatase 2B catalytic subunit Caenorhabditis elegans SS
10 20 30 40 50 60
MSVRRPQFST TERVIKAVPF PPTRRLTLKE VFENGKPKMD LLKNHLVKEG RVEEEVALKI
70 80 90 100 110 120
INDGAAILKQ EKTMIEVEAP ITVCGDVHGQ FFDLMKLFEV GGSPSNTRYL FLGDYVDRGY
130 140 150 160 170 180
FSIECVLYLW SLKINHPKTL FLLRGNHECR HLTEYFTFKQ ECRIKYSEMV YDACMHTFDC
190 200 210 220 230 240
LPLAALLNQQ FLCVHGGMSP EITCLEDIRK LDRFSEPPAF GPVCDLLWSD PLEDYGSEKT
250 260 270 280 290 300
LEHYTHNTVR GCSYFFSYPA VCEFLQNNSL LSIIRAHEAQ DAGYRMYRKN QATGFPSLIT
310 320 330 340 350 360
IFSAPNYLDV YNNKAAVLKY ENNVMNIRQF NCSPHPYWLP NFMDVFTWSL PFVGEKVTEM
370 380 390 400 410 420
LVNILNICSD EEMNVTDEEG ATTGRKEVIK NKIRAIGKMA RVFTVLREES ENVLTLKGLT
430 440 450 460 470 480
PTGTLPLGVL SGGKQTIETA KQEAAEEREA IRGFTIAHRI RSFEEARGLD RINERMPPRK
490 500 510
EASYHHDAGR MHSHSHPPHP QASRRTDHGK KAL