Entry
Name
Protein processing in endoplasmic reticulum - Pyrus x bretschneideri (Chinese white pear)
Description
The endoplasmic reticulum (ER) is a subcellular organelle where proteins are folded with the help of lumenal chaperones. Newly synthesized peptides enter the ER via the sec61 pore and are glycosylated. Correctly folded proteins are packaged into transport vesicles that shuttle them to the Golgi complex. Misfolded proteins are retained within the ER lumen in complex with molecular chaperones. Proteins that are terminally misfolded bind to BiP and are directed toward degradation through the proteasome in a process called ER-associated degradation (ERAD). Accumulation of misfolded proteins in the ER causes ER stress and activates a signaling pathway called the unfolded protein response (UPR). In certain severe situations, however, the protective mechanisms activated by the UPR are not sufficient to restore normal ER function and cells die by apoptosis.
Class
Genetic Information Processing; Folding, sorting and degradation
BRITE hierarchy
Pathway map
pxb04141 Protein processing in endoplasmic reticulum
Ortholog table
Other DBs
Organism
Pyrus x bretschneideri (Chinese white pear) [GN:
pxb ]
Gene
103936646 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1B [KO:K12666 ]
103952914 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1A-like [KO:K12666 ]
103961750 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1A-like [KO:K12666 ]
103928776 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2-like isoform X1 [KO:K12667 ]
103942735 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2-like [KO:K12667 ]
103958868 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2-like isoform X1 [KO:K12667 ]
103956543 dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit DAD1 [KO:K12668 ]
103940190 dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit-like [KO:K12670 ]
103934696 dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit-like [KO:K12670 ]
103964412 dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit-like [KO:K12670 ]
103963172 dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit-like [KO:K12670 ]
103933016 probable dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 3B isoform X1 [KO:K19478 ]
103948137 probable dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 3B isoform X1 [KO:K19478 ]
103954729 probable dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 3B [KO:K19478 ]
103945535 protein transport protein SEC31 homolog B-like isoform X1 [KO:K14005 ]
103956602 protein transport protein Sec24-like At4g32640 isoform X1 [KO:K14007 ]
103940000 UDP-glucose:glycoprotein glucosyltransferase-like [KO:K11718 ] [EC:2.4.1.-]
103946309 UDP-glucose:glycoprotein glucosyltransferase-like [KO:K11718 ] [EC:2.4.1.-]
103951303 endoplasmic reticulum oxidoreductin-1-like isoform X2 [KO:K10950 ] [EC:1.8.4.-]
103966229 translocon-associated protein subunit alpha-like isoform X1 [KO:K13249 ]
103929929 plant UBX domain-containing protein 11-like isoform X2 [KO:K24348 ]
103954283 ubiquitin fusion degradation protein 1 homolog isoform X1 [KO:K14016 ]
103931072 probable mediator of RNA polymerase II transcription subunit 37e [KO:K03283 ]
103946362 stromal 70 kDa heat shock-related protein, chloroplastic-like [KO:K03283 ]
103945001 stromal 70 kDa heat shock-related protein, chloroplastic [KO:K03283 ]
103963573 probable mediator of RNA polymerase II transcription subunit 37e [KO:K03283 ]
103959948 LOW QUALITY PROTEIN: 15.7 kDa heat shock protein, peroxisomal [KO:K13993 ]
103940610 ubiquitin thioesterase OTU1-like isoform X1 [KO:K13719 ] [EC:3.1.2.-]
103929613 ubiquitin domain-containing protein DSK2b-like isoform X1 [KO:K04523 ]
103937127 eukaryotic translation initiation factor 2 subunit alpha-like [KO:K03237 ]
103958644 eukaryotic translation initiation factor 2 subunit alpha [KO:K03237 ]
103959164 LOW QUALITY PROTEIN: serine/threonine-protein kinase/endoribonuclease IRE1a-like [KO:K08852 ] [EC:2.7.11.1 3.1.26.-]
103950570 ERAD-associated E3 ubiquitin-protein ligase component HRD3A [KO:K14026 ]
103946929 ERAD-associated E3 ubiquitin-protein ligase component HRD3A-like [KO:K14026 ]
Compound
Reference
Authors
Naidoo N
Title
ER and aging-Protein folding and the ER stress response.
Journal
Reference
Authors
Malhotra JD, Kaufman RJ
Title
The endoplasmic reticulum and the unfolded protein response.
Journal
Reference
Authors
Maattanen P, Gehring K, Bergeron JJ, Thomas DY
Title
Protein quality control in the ER: the recognition of misfolded proteins.
Journal
Reference
Authors
Stolz A, Wolf DH
Title
Endoplasmic reticulum associated protein degradation: a chaperone assisted journey to hell.
Journal
Reference
Authors
Dejgaard K, Theberge JF, Heath-Engel H, Chevet E, Tremblay ML, Thomas DY
Title
Organization of the Sec61 translocon, studied by high resolution native electrophoresis.
Journal
Related pathway
KO pathway
LinkDB
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