The three-dimensional structure of the electron transport protein thioredoxin-S2 from E. coli has been determined from a 2.8 A resolution electron density map. The molecule is built up of a central core of three parallel and two antiparallel strands of pleated sheet surrounded by four helices. Thr residues involved in the active center 14-membered disulfide ring of thioredoxin form a protrusion between one of the helices and the middle strand of the pleated sheet. This region of the molecule, comprising two parallel strands joined by the protrusion and a helix, is structurally very similar to corresponding functionally important regions in the nucleotide-binding domains of flavodoxin and the dehydrogenases. The molecule has about 75% of the residues in well-defined secondary structures. The structure indicates that the carboxy-terminal third of the molecule forms an independent folding unit consisting of two strands of antiparallel pleated sheet and a terminal alpha-helix. This agress with the noncovalent reconstitution experiments from thioredoxin peptide fragments. Thioredoxin is an example of a protein with the active center located on a protrusion rather than in a cleft, thus demonstrating the existence of male proteins.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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