Entry
Name
Protein processing in endoplasmic reticulum - Mirounga leonina (Southern elephant seal)
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
mlx04141 Protein processing in endoplasmic reticulum
Other DBs
Organism
Mirounga leonina (Southern elephant seal) [GN:
mlx ]
Gene
117998240 PPP1R15A; protein phosphatase 1 regulatory subunit 15A [KO:K14019 ]
117998657 ATF4; cyclic AMP-dependent transcription factor ATF-4 [KO:K04374 ]
117999771 UFD1; ubiquitin recognition factor in ER-associated degradation protein 1 isoform X1 [KO:K14016 ]
118000541 MAN1B1; endoplasmic reticulum mannosyl-oligosaccharide 1,2-alpha-mannosidase [KO:K23741 ]
118001568 SEC63; translocation protein SEC63 homolog isoform X1 [KO:K09540 ]
118002128 EIF2S1; eukaryotic translation initiation factor 2 subunit 1 [KO:K03237 ]
118002645 STT3B; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3B [KO:K07151 ] [EC:2.4.99.18 ]
118002672 ERO1A; ERO1-like protein alpha isoform X1 [KO:K10950 ] [EC:1.8.4.-]
118003056 DAD1; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit DAD1 [KO:K12668 ]
118004893 SEC61A1; protein transport protein Sec61 subunit alpha [KO:K10956 ]
118004944 RPN1; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1 [KO:K12666 ]
118005645 SSR3; translocon-associated protein subunit gamma isoform X1 [KO:K13251 ]
118005960 EDEM1; ER degradation-enhancing alpha-mannosidase-like protein 1 isoform X1 [KO:K10084 ]
118006088 RAD23A; UV excision repair protein RAD23 homolog A isoform X1 [KO:K10839 ]
118007685 PREB; prolactin regulatory element-binding protein isoform X1 [KO:K14003 ]
118009289 UGGT2; UDP-glucose:glycoprotein glucosyltransferase 2 isoform X1 [KO:K11718 ] [EC:2.4.1.-]
118011212 RRBP1; LOW QUALITY PROTEIN: ribosome-binding protein 1 [KO:K14000 ]
118011459 RPN2; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2 isoform X1 [KO:K12667 ]
118012253 DNAJC10; dnaJ homolog subfamily C member 10 isoform X1 [KO:K09530 ] [EC:1.8.4.-]
118012291 NFE2L2; nuclear factor erythroid 2-related factor 2 isoform X1 [KO:K05638 ]
118012583 UGGT1; UDP-glucose:glycoprotein glucosyltransferase 1 isoform X1 [KO:K11718 ] [EC:2.4.1.-]
118012936 ERO1B; ERO1-like protein beta isoform X1 [KO:K10976 ] [EC:1.8.4.-]
118013369 STT3A; dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3A [KO:K07151 ] [EC:2.4.99.18 ]
118013784 HSPA6; LOW QUALITY PROTEIN: heat shock 70 kDa protein 6 [KO:K03283 ]
118013876 KRTCAP2; keratinocyte-associated protein 2 isoform X1 [KO:K28202 ]
118014029 ATF6; cyclic AMP-dependent transcription factor ATF-6 alpha [KO:K09054 ]
118014386 EDEM3; ER degradation-enhancing alpha-mannosidase-like protein 3 isoform X1 [KO:K10086 ]
118014908 SSR4; translocon-associated protein subunit delta isoform X1 [KO:K04571 ]
118014909 TRAM1; translocating chain-associated membrane protein 1 isoform X1 [KO:K14010 ]
118017848 RAD23B; UV excision repair protein RAD23 homolog B isoform X1 [KO:K10839 ]
118017985 VCP; transitional endoplasmic reticulum ATPase isoform X1 [KO:K13525 ]
118018056 PLAA; phospholipase A-2-activating protein isoform X1 [KO:K14018 ]
118019926 DDOST; dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit [KO:K12670 ]
118021211 DNAJB12; dnaJ homolog subfamily B member 12 isoform X1 [KO:K09518 ]
118021582 SEC61A2; protein transport protein Sec61 subunit alpha isoform X1 [KO:K10956 ]
118023758 HERPUD1; homocysteine-responsive endoplasmic reticulum-resident ubiquitin-like domain member 1 protein isoform X1 [KO:K14027 ]
118024172 NPLOC4; nuclear protein localization protein 4 homolog [KO:K14015 ]
118024372 ERN1; serine/threonine-protein kinase/endoribonuclease IRE1 isoform X1 [KO:K08852 ] [EC:2.7.11.1 3.1.26.-]
118024534 SEC61G; protein transport protein Sec61 subunit gamma [KO:K07342 ]
118027026 TRAM1L1; translocating chain-associated membrane protein 1-like 1 [KO:K14010 ]
118027308 ATF6B; cyclic AMP-dependent transcription factor ATF-6 beta isoform X1 [KO:K09049 ]
118027433 SSR1; translocon-associated protein subunit alpha isoform X1 [KO:K13249 ]
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