Reviewed,
UniProtKB/Swiss-Prot Q96HE7 (ERO1A_HUMAN)
Last modified
December 15, 2009.
Version 74.
History...
Clusters with 100%,
90%,
50% identity |
Documents (2) |
Third-party data |
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Names and origin
| Protein names | Recommended name: ERO1-like protein alpha Short name=ERO1-L-alpha Short name=ERO1-L EC=1.8.4.- Alternative name(s): Oxidoreductin-1-L-alpha Endoplasmic oxidoreductin-1-like protein | ||||
| Gene names |
| ||||
| Organism | Homo sapiens (Human) [Complete proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo |
Protein attributes
| Sequence length | 468 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level. |
General annotation (Comments)
| Function | Essential oxidoreductase that oxidizes proteins in the endoplasmic reticulum to produce disulfide bonds. Acts by oxidizing directly P4HB/PDI isomerase through a direct disulfide exchange. Does not act as a direct oxidant of folding substrate, but relies on P4HB/PDI to transfer oxidizing equivalent. Associates with ERP44 but not with GRP54, demonstrating that it does not oxidize all PDI related proteins and can discriminate between PDI and related proteins. Its reoxidation probably involves electron transfer to molecular oxygen via FAD. Acts independently of glutathione. May be responsible for a significant proportion of reactive oxygen species (ROS) in the cell, thereby being a source of oxidative stress. Required for the folding of immunoglobulin proteins. Responsible for the release of the unfolded cholera toxin from reduced P4HB/PDI in case of infection by V.cholerae, thereby playing a role in retrotranslocation of the toxin. Ref.1 Ref.7 Ref.9 Ref.11 Ref.17 Ref.18 |
| Cofactor | FAD. Ref.18 |
| Enzyme regulation | Enzyme activity is tighly regulated to prevent the accumulation of reactive oxygen species in the endoplasmic reticulum. Reversibly down-regulated by the formation of disulfide bonds between the active site Cys-94 and Cys-131, and between Cys-99 and Cys-104. Glutathione may be required to regulate its activity in the endoplasmic reticulum. Ref.17 Ref.18 Ref.15 |
| Subunit structure | Predominantly monomer. May function both as a monomer and a homodimer. Interacts with PDILT. Ref.9 Ref.18 Ref.10 Ref.16 |
| Subcellular location | Endoplasmic reticulum membrane; Peripheral membrane protein; Lumenal side. Note: The association with ERP44 is essential for its retention in the endoplasmic reticulum. Ref.1 Ref.13 |
| Tissue specificity | Widely expressed at low level. Expressed at high level in upper digestive tract. Highly expressed in esophagus. Weakly expressed in stomach and duodenum. Ref.8 |
| Induction | Stimulated by hypoxia; suggesting that it is regulated via the HIF-pathway. Ref.12 |
| Post-translational modification | N-glycosylated. Ref.1 Ref.7 Ref.20 The Cys-94/Cys-99 and Cys-394/Cys-397 disulfide bonds constitute the redox-active center. The Cys-94/Cys-99 disulfide bond may accept electron from P4HB and funnel them to the active site disulfide Cys-394/Cys-397 By similarity. |
| Sequence similarities | Belongs to the EROs family. |
Ontologies
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Signal peptide | 1 – 23 | 23 | |||||||||
| Chain | 24 – 468 | 445 | ERO1-like protein alpha | PRO_0000008415 | |||||||
Sites | |||||||||||
| Binding site | 187 | 1 | FAD By similarity | ||||||||
| Binding site | 189 | 1 | FAD By similarity | ||||||||
| Binding site | 200 | 1 | FAD By similarity | ||||||||
| Binding site | 252 | 1 | FAD By similarity | ||||||||
| Binding site | 255 | 1 | FAD By similarity | ||||||||
| Binding site | 287 | 1 | FAD By similarity | ||||||||
Amino acid modifications | |||||||||||
| Glycosylation | 280 | 1 | N-linked (GlcNAc...) Ref.20 | ||||||||
| Glycosylation | 384 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Disulfide bond | 35 ↔ 46 | Or C-35 with C-48 Ref.17 Ref.18 | |||||||||
| Disulfide bond | 37 ↔ 48 | Or C-35 with C-46 Ref.17 Ref.18 | |||||||||
| Disulfide bond | 85 ↔ 391 | Ref.17 Ref.18 | |||||||||
| Disulfide bond | 94 ↔ 131 | Alternate Ref.17 Ref.18 | |||||||||
| Disulfide bond | 94 ↔ 99 | Redox-active Ref.17 Ref.18 | |||||||||
| Disulfide bond | 99 ↔ 104 | Alternate Ref.17 Ref.18 | |||||||||
| Disulfide bond | 208 ↔ 241 | Ref.17 Ref.18 | |||||||||
| Disulfide bond | 394 ↔ 397 | Redox-active Ref.17 Ref.18 | |||||||||
Experimental info | |||||||||||
| Mutagenesis | 85 | 1 | C → A: Alters protein folding and stability. Loss of regulatory disulfide bond formation and increased activity towards PDI; when associated with A-131. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 85 | 1 | C → S: Induces a decrease in activity. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 94 | 1 | C → S: Induces a decrease in activity towards thioredoxin. Loss of activity towards thioredoxin and loss of regulatory disulfide bond formation; when associated with A-99. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 99 | 1 | C → A: Acts as a weak dominant-negative mutant. Loss of activity towards thioredoxin. Loss of regulatory disulfide bond formation; when associated with A-94. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 104 | 1 | C → A: No effect. Strongly increased activity towards PDI; when associated with A-131. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 104 | 1 | C → S: No effect. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 131 | 1 | C → A: Loss of regulatory disulfide bond formation and increased activity towards PDI. Loss of regulatory disulfide bond formation and strongly increased activity towards PDI; when associated with A-85. Loss of regulatory disulfide bond formation and strongly increased activity towards PDI; when associated with A-104. Ref.17 Ref.18 Ref.14 | ||||||||
| Mutagenesis | 166 | 1 | C → A: No effect. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 208 | 1 | C → A or S: No effect. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 241 | 1 | C → A or S: No effect. Ref.18 Ref.14 | ||||||||
| Mutagenesis | 280 | 1 | N → A: No effect on activity. Ref.14 | ||||||||
| Mutagenesis | 384 | 1 | N → A: No effect on activity. Ref.14 | ||||||||
| Mutagenesis | 391 | 1 | C → A: Alters protein folding. Prevents formation of regulatory disulfide bond and down-regulation of activity. Decreases association with P4HB. Ref.1 Ref.7 Ref.14 | ||||||||
| Mutagenesis | 394 | 1 | C → A: Retains activity towards PDI. Does not act as a dominant negative mutant. Induces defects in folding. Remains associated with P4HB. Ref.1 Ref.7 Ref.9 Ref.17 Ref.14 | ||||||||
| Mutagenesis | 397 | 1 | C → A: Acts as a dominant negative mutant; does not induce defects in folding; remains associated with P4HB. Ref.7 Ref.9 Ref.14 | ||||||||
| Sequence conflict | 456 | 1 | E → K in AAH08674. Ref.4 | ||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "ERO1-L, a human protein that favors disulfide bond formation in the endoplasmic reticulum." Cabibbo A., Pagani M., Fabbri M., Rocchi M., Farmery M.R., Bulleid N.J., Sitia R. J. Biol. Chem. 275:4827-4833(2000) [PubMed: 10671517] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], FUNCTION, SUBCELLULAR LOCATION, GLYCOSYLATION, MUTAGENESIS OF CYS-391 AND CYS-394. Tissue: Embryonic carcinoma. |
| [2] | "The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment." Clark H.F., Gurney A.L., Abaya E., Baker K., Baldwin D.T., Brush J., Chen J., Chow B., Chui C., Crowley C., Currell B., Deuel B., Dowd P., Eaton D., Foster J.S., Grimaldi C., Gu Q., Hass P.E. Gray A.M.Genome Res. 13:2265-2270(2003) [PubMed: 12975309] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. |
| [3] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed: 14702039] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Trachea. |
| [4] | "The DNA sequence and analysis of human chromosome 14." Heilig R., Eckenberg R., Petit J.-L., Fonknechten N., Da Silva C., Cattolico L., Levy M., Barbe V., De Berardinis V., Ureta-Vidal A., Pelletier E., Vico V., Anthouard V., Rowen L., Madan A., Qin S., Sun H., Du H. Weissenbach J.Nature 421:601-607(2003) [PubMed: 12508121] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [5] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Eye. |
| [6] | "The C-terminal domain of yeast Ero1p mediates membrane localization and is essential for function." Pagani M., Pilati S., Bertoli G., Valsasina B., Sitia R. FEBS Lett. 508:117-120(2001) [PubMed: 11707280] [Abstract] Cited for: PROTEIN SEQUENCE OF N-TERMINUS, MASS SPECTROMETRY. |
| [7] | "The CXXCXXC motif determines the folding, structure and stability of human Ero1-Lalpha." Benham A.M., Cabibbo A., Fassio A., Bulleid N., Sitia R., Braakman I. EMBO J. 19:4493-4502(2000) [PubMed: 10970843] [Abstract] Cited for: FUNCTION, GLYCOSYLATION, MUTAGENESIS OF CYS-391; CYS-394 AND CYS-397. |
| [8] | "Endoplasmic reticulum oxidoreductin 1-lbeta (ERO1-Lbeta), a human gene induced in the course of the unfolded protein response." Pagani M., Fabbri M., Benedetti C., Fassio A., Pilati S., Bulleid N.J., Cabibbo A., Sitia R. J. Biol. Chem. 275:23685-23692(2000) [PubMed: 10818100] [Abstract] Cited for: TISSUE SPECIFICITY. |
| [9] | "Manipulation of oxidative protein folding and PDI redox state in mammalian cells." Mezghrani A., Fassio A., Benham A., Simmen T., Braakman I., Sitia R. EMBO J. 20:6288-6296(2001) [PubMed: 11707400] [Abstract] Cited for: FUNCTION, POTENTIAL HOMODIMERIZATION, ASSOCIATION WITH P4HB, LACK OF ASSOCIATION WITH GRP58, MUTAGENESIS OF CYS-394 AND CYS-397. |
| [10] | "ERp44, a novel endoplasmic reticulum folding assistant of the thioredoxin family." Anelli T., Alessio M., Mezghrani A., Simmen T., Talamo F., Bachi A., Sitia R. EMBO J. 21:835-844(2002) [PubMed: 11847130] [Abstract] Cited for: INTERACTION WITH ERP44. |
| [11] | "Unfolded cholera toxin is transferred to the ER membrane and released from protein disulfide isomerase upon oxidation by Ero1." Tsai B., Rapoport T.A. J. Cell Biol. 159:207-216(2002) [PubMed: 12403808] [Abstract] Cited for: FUNCTION. |
| [12] | "The cellular oxygen tension regulates expression of the endoplasmic oxidoreductase ERO1-Lalpha." Gess B., Hofbauer K.H., Wenger R.H., Lohaus C., Meyer H.E., Kurtz A. Eur. J. Biochem. 270:2228-2235(2003) [PubMed: 12752442] [Abstract] Cited for: INDUCTION. |
| [13] | "Thiol-mediated protein retention in the endoplasmic reticulum: the role of ERp44." Anelli T., Alessio M., Bachi A., Bergamelli L., Bertoli G., Camerini S., Mezghrani A., Ruffato E., Simmen T., Sitia R. EMBO J. 22:5015-5022(2003) [PubMed: 14517240] [Abstract] Cited for: SUBCELLULAR LOCATION. |
| [14] | "Two conserved cysteine triads in human Ero1alpha cooperate forefficient disulfide bond formation in the ER." Bertoli G., Simmen T., Anelli T., Nerini Molteni S., Fesce R., Sitia R. J. Biol. Chem. 279:30047-30052(2004) [PubMed: 15136577] [Abstract] Cited for: MUTAGENESIS OF CYS-85; CYS-94; CYS-99; CYS-104; CYS-131; CYS-166; CYS-208; CYS-241; ASN-280; ASN-384; CYS-391; CYS-394 AND CYS-397. |
| [15] | "Glutathione limits Ero1-dependent oxidation in the endoplasmic reticulum." Nerini Molteni S., Fassio A., Ciriolo M.R., Filomeni G., Pasqualetto E., Fagioli C., Sitia R. J. Biol. Chem. 279:32667-32673(2004) [PubMed: 15161913] [Abstract] Cited for: ENZYME REGULATION. |
| [16] | "PDILT, a divergent testis-specific protein disulfide isomerase with a non-classical SXXC motif that engages in disulfide-dependent interactions in the endoplasmic reticulum." van Lith M., Hartigan N., Hatch J., Benham A.M. J. Biol. Chem. 280:1376-1383(2005) [PubMed: 15475357] [Abstract] Cited for: INTERACTION WITH PDILT. |
| [17] | "A novel disulphide switch mechanism in Ero1alpha balances ER oxidation in human cells." Appenzeller-Herzog C., Riemer J., Christensen B., Soerensen E.S., Ellgaard L. EMBO J. 27:2977-2987(2008) [PubMed: 18833192] [Abstract] Cited for: FUNCTION, ENZYME REGULATION, DISULFIDE BONDS, MUTAGENESIS OF CYS-131 AND CYS-394, MASS SPECTROMETRY. |
| [18] | "Low reduction potential of Ero1alpha regulatory disulphides ensures tight control of substrate oxidation." Baker K.M., Chakravarthi S., Langton K.P., Sheppard A.M., Lu H., Bulleid N.J. EMBO J. 27:2988-2997(2008) [PubMed: 18971943] [Abstract] Cited for: FUNCTION, ENZYME REGULATION, COFACTOR, SUBUNIT, DISULFIDE BONDS, MUTAGENESIS OF CYS-85; CYS-94; CYS-99; CYS-104; CYS-131; CYS-166; CYS-208 AND CYS-241. |
| [19] | Colinge J., Superti-Furga G., Bennett K.L. Submitted (OCT-2008) to UniProtKB Cited for: IDENTIFICATION [LARGE SCALE ANALYSIS], MASS SPECTROMETRY. |
| [20] | "Glycoproteomics analysis of human liver tissue by combination of multiple enzyme digestion and hydrazide chemistry." Chen R., Jiang X., Sun D., Han G., Wang F., Ye M., Wang L., Zou H. J. Proteome Res. 8:651-661(2009) [PubMed: 19159218] [Abstract] Cited for: GLYCOSYLATION [LARGE SCALE ANALYSIS] AT ASN-280, MASS SPECTROMETRY. Tissue: Liver. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| AF081886 mRNA. Translation: AAF35260.1. AF123887 mRNA. Translation: AAF06104.1. AY358463 mRNA. Translation: AAQ88828.1. AK292839 mRNA. Translation: BAF85528.1. AL133453 Genomic DNA. No translation available. BC008674 mRNA. Translation: AAH08674.1. BC012941 mRNA. Translation: AAH12941.1. | |
| IPI | IPI00386755. |
| RefSeq | NP_055399.1. |
| UniGene | Hs.592304 |
3D structure databases | |
| ModBase | Search... |
Protein-protein interaction databases | |
| STRING | Q96HE7. |
Proteomic databases | |
| PeptideAtlas | Q96HE7. |
| PRIDE | Q96HE7. |
Genome annotation databases | |
| Ensembl | ENST00000395686; ENSP00000379042; ENSG00000197930; Homo sapiens. [Genome view] |
| GeneID | 30001. |
| KEGG | hsa:30001. |
| UCSC | uc001wzv.1. human. |
Organism-specific databases | |
| CTD | 30001. |
| GeneCards | GC14M052178. |
| H-InvDB | HIX0011660. |
| HGNC | HGNC:13280. ERO1L. |
| HPA | HPA026653. |
| PharmGKB | PA27862. |
| GenAtlas | Search... |
Phylogenomic databases | |
| HOGENOM | HBG521237. |
| HOVERGEN | Q96HE7. |
| OMA | DDIQSPD. |
| OrthoDB | EOG9RBT4J. |
Enzyme and pathway databases | |
| BioCyc | CATTLE:ENSBTAG00000015716-MON. |
| Reactome | REACT_15380. Diabetes pathways. |
Gene expression databases | |
| ArrayExpress | Q96HE7. |
| Bgee | Q96HE7. |
| CleanEx | HS_ERO1L. |
| Genevestigator | Q96HE7. |
| GermOnline | ENSG00000197930. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR007266. ERO1. [Graphical view] |
| PANTHER | PTHR12613. ERO1. 1 hit. |
| Pfam | PF04137. ERO1. 1 hit. [Graphical view] |
| PIRSF | PIRSF017205. ERO1. 1 hit. |
| ProtoNet | Search... |
Other Resources | |
| NextBio | 52816. |
Entry information
| Entry name | ERO1A_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q96HE7 Secondary accession number(s): A8K9X4 Q9UKV6 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation project | HPI (Human Proteome Initiative) | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 14 Human chromosome 14: entries, gene names and cross-references to MIM |
| SIMILARITY comments Index of protein domains and families |

Clusters with


