Entry
Name
Protein processing in endoplasmic reticulum - Ursus maritimus (polar bear)
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
umr04141 Protein processing in endoplasmic reticulum
Other DBs
Organism
Ursus maritimus (polar bear) [GN:
umr ]
Gene
103657105 PPP1R15A; protein phosphatase 1 regulatory subunit 15A [KO:K14019 ]
103657647 UGGT2; UDP-glucose:glycoprotein glucosyltransferase 2 [KO:K11718 ] [EC:2.4.1.-]
103657752 YOD1; ubiquitin thioesterase OTU1 isoform X2 [KO:K13719 ] [EC:3.1.2.-]
103658290 ATF6; cyclic AMP-dependent transcription factor ATF-6 alpha [KO:K09054 ]
103658293 HSPA6; LOW QUALITY PROTEIN: heat shock 70 kDa protein 6 [KO:K03283 ]
103658560 UGGT1; UDP-glucose:glycoprotein glucosyltransferase 1 isoform X1 [KO:K11718 ] [EC:2.4.1.-]
103659605 NFE2L2; nuclear factor erythroid 2-related factor 2 isoform X2 [KO:K05638 ]
103659645 DNAJC10; dnaJ homolog subfamily C member 10 isoform X1 [KO:K09530 ] [EC:1.8.4.-]
103660628 STT3A; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3A [KO:K07151 ] [EC:2.4.99.18 ]
103661769 TRAM1L1; translocating chain-associated membrane protein 1-like 1 [KO:K14010 ]
103662007 ERO1B; ERO1-like protein beta isoform X1 [KO:K10976 ] [EC:1.8.4.-]
103663811 SAR1B; GTP-binding protein SAR1b isoform X1 [KO:K07953 ] [EC:3.6.5.-]
103663976 BAG2; BAG family molecular chaperone regulator 2 isoform X1 [KO:K09556 ]
103664344 HSPH1; LOW QUALITY PROTEIN: heat shock protein 105 kDa [KO:K09485 ]
103664937 SSR1; translocon-associated protein subunit alpha isoform X1 [KO:K13249 ]
103665994 NPLOC4; nuclear protein localization protein 4 homolog isoform X1 [KO:K14015 ]
103666588 DDOST; dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit [KO:K12670 ]
103666999 PLAA; phospholipase A-2-activating protein isoform X1 [KO:K14018 ]
103667810 DNAJB12; dnaJ homolog subfamily B member 12 isoform X1 [KO:K09518 ]
103668803 EDEM3; ER degradation-enhancing alpha-mannosidase-like protein 3 [KO:K10086 ]
103669252 UFD1; ubiquitin recognition factor in ER-associated degradation protein 1 [KO:K14016 ]
103669615 SEC61A1; protein transport protein Sec61 subunit alpha [KO:K10956 ]
103669619 RPN1; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1 [KO:K12666 ]
103669652 EDEM1; ER degradation-enhancing alpha-mannosidase-like protein 1 [KO:K10084 ]
103669902 RPN2; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2 isoform X1 [KO:K12667 ]
103671648 DNAJC5G; LOW QUALITY PROTEIN: dnaJ homolog subfamily C member 5G [KO:K09525 ]
103671936 EIF2S1; eukaryotic translation initiation factor 2 subunit 1 [KO:K03237 ]
103672910 ERO1A; ERO1-like protein alpha isoform X2 [KO:K10950 ] [EC:1.8.4.-]
103673772 HERPUD1; homocysteine-responsive endoplasmic reticulum-resident ubiquitin-like domain member 1 protein isoform X1 [KO:K14027 ]
103674548 SEC61G; protein transport protein Sec61 subunit gamma [KO:K07342 ]
103675841 SEC63; translocation protein SEC63 homolog isoform X1 [KO:K09540 ]
103676056 DNAJB11; dnaJ homolog subfamily B member 11 isoform X1 [KO:K09517 ]
103676291 SEC61A2; protein transport protein Sec61 subunit alpha isoform X1 [KO:K10956 ]
103676372 ATF4; cyclic AMP-dependent transcription factor ATF-4 [KO:K04374 ]
103678550 RAD23B; UV excision repair protein RAD23 homolog B isoform X1 [KO:K10839 ]
103679671 BCAP31; B-cell receptor-associated protein 31 isoform X1 [KO:K14009 ]
103679697 SSR4; translocon-associated protein subunit delta isoform X1 [KO:K04571 ]
103680114 STT3B; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3B [KO:K07151 ] [EC:2.4.99.18 ]
103681026 DAD1; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit DAD1 [KO:K12668 ]
103681245 TRAM1; translocating chain-associated membrane protein 1 isoform X1 [KO:K14010 ]
103681888 MAP2K7; LOW QUALITY PROTEIN: dual specificity mitogen-activated protein kinase kinase 7 [KO:K04431 ] [EC:2.7.12.2 ]
103682145 RAD23A; UV excision repair protein RAD23 homolog A isoform X1 [KO:K10839 ]
103682282 ATF6B; cyclic AMP-dependent transcription factor ATF-6 beta isoform X1 [KO:K09049 ]
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