Protein Domain : IPR009169

Type:  Family Name:  Calreticulin
Description:  Calreticulin is a ubiquitous protein found in a wide range of species and in all nucleated cell types. It is an ancient and highly conserved protein with an exceptionally wide scope and variety of functions. Initially known as the high-affinity calcium-binding endoplasmic reticulum (ER) and sarcoplamic reticulum (SR) protein "calregulin", calreticulin is now known to associate with proteins in the cytoplasm, nucleus and extracellular compartment. Calreticulin is a major Ca2+-binding/storage chaperone residing in the ER lumen []. Molecular chaperones residing in the ER facilitate the folding and prevent the aggregation of newly synthesized proteins. Interaction between the molecular chaperone and the misfolded protein leads to the retention, retranslocation and eventual degradation of the misfolded protein by the proteasome after ubiquitination []. Calreticulin binds (buffers) Ca2+with high capacity and participates in folding newly synthesized proteins and glycoproteins. It is an important component of the calreticulin/calnexin cycle and quality control pathways in the ER []. Studies on calreticulin-deficient and calreticulin-transgenic mice revealed that calreticulin is a new cardiac embryonic gene and is essential during cardiac development [, ]. Calreticulin has also been characterised as an extracellular lectin, an intracellular mediator of integrin-mediated cell adhesion, an inhibitor of steroid hormone-regulated gene expression and a C1q-binding protein []. A proposed model of calreticulin domains includes a globular N-domain, a central proline-rich P-domain and an acidic C-domain. A detailed structure of the central P-domain was revealed by NMR studies, while a model of the globular N-domain of calreticulin is based on crystallographic data reported for the highly similar calnexin [].Calreticulin is also known as calregulin, Erp60, CRP55, CAB-63 and CaBP3 []. Short Name:  Calreticulin

0 Child Features

2 Contains

DB identifier Type Name
IPR009033 Domain Calreticulin/calnexin, P domain
IPR018124 Conserved_site Calreticulin/calnexin, conserved site

1 Cross References

Identifier
PIRSF002356

0 Found In

4 GO Annotations

GO Term Gene Name
GO:0005509 IPR009169
GO:0051082 IPR009169
GO:0006457 IPR009169
GO:0005783 IPR009169

4 Ontology Annotations

GO Term Gene Name
GO:0005509 IPR009169
GO:0051082 IPR009169
GO:0006457 IPR009169
GO:0005783 IPR009169

1 Parent Features

DB identifier Type Name
IPR001580 Family Calreticulin/calnexin

3256 Proteins

DB identifier UniProt Accession Secondary Identifier Organism Name Length
144212 D8R5B2 PAC:15416865 Selaginella moellendorffii 401  
89431 D8RBZ4 PAC:15409341 Selaginella moellendorffii 385  
evm.model.supercontig_48.152 PAC:16420787 Carica papaya 437  
evm.model.supercontig_9.319 PAC:16428223 Carica papaya 369  
29929.m004552 B9RM48 PAC:16813792 Ricinus communis 423  
30128.m008900 B9RFI2 PAC:16818486 Ricinus communis 415  
Cucsa.095610.1 A0A0A0KTX6 PAC:16957915 Cucumis sativus 431  
Cucsa.090760.1 A0A0A0LFZ8 PAC:16957347 Cucumis sativus 420  
orange1.1g016100m A0A067EQ88 PAC:18119672 Citrus sinensis 395  
orange1.1g017253m A0A067EQ95 PAC:18119674 Citrus sinensis 374  
orange1.1g017283m A0A067EQ95 PAC:18119673 Citrus sinensis 374  
orange1.1g018039m A0A067EDB7 PAC:18119675 Citrus sinensis 362  
orange1.1g014803m A0A067EGQ5 PAC:18119668 Citrus sinensis 418  
orange1.1g015060m A0A067EDB3 PAC:18119670 Citrus sinensis 414  
orange1.1g014968m A0A067ED11 PAC:18119669 Citrus sinensis 415  
orange1.1g015498m A0A067EPE3 PAC:18119671 Citrus sinensis 405  
AT1G08450.1 O04153 PAC:19654732 Arabidopsis thaliana 424  
AT1G56340.1 O04151 PAC:19654346 Arabidopsis thaliana 425  
AT1G09210.1 Q38858 PAC:19649822 Arabidopsis thaliana 424  
AT1G56340.2 F4I529 PAC:19654347 Arabidopsis thaliana 424  
Thhalv10007734m V4MV78 PAC:20186357 Eutrema salsugineum 419  
Thhalv10007710m V4L190 PAC:20186356 Eutrema salsugineum 425  
Thhalv10007717m V4KX70 PAC:20188316 Eutrema salsugineum 423  
Thhalv10023481m V4KII7 PAC:20201192 Eutrema salsugineum 423  
Ciclev10001298m V4SGH6 PAC:20786736 Citrus clementina 418  
Ciclev10012035m V4SXI7 PAC:20796581 Citrus clementina 362  
Ciclev10011848m V4SSF8 PAC:20796577 Citrus clementina 414  
Ciclev10012032m V4SXI7 PAC:20796582 Citrus clementina 362  
Ciclev10012034m V4SXI7 PAC:20796579 Citrus clementina 362  
Ciclev10012031m V4SXI7 PAC:20796580 Citrus clementina 362  

7 Publications

First Author Title Year Journal Volume Pages PubMed ID
            1497605
            11248044
            12445456
            9038332
            10085286
            11375414
            9693955