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Title :   CRYSTAL STRUCTURE OF REDUCED THIOREDOXIN REDUCTASE FROM ESCHERICHIA COLI.

Authors :   B. W. Lennon, C. H. Williams Jr, M. L. Ludwig

Date :   04 May 99 (Deposition) - 03 Dec 99 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.50

Chains :   Asym. Unit : A
Biol. Unit 1: A  (2x)

Keywords :   Flavoenzyme, Oxidoreductase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   B. W. Lennon, C. H. Williams Jr. , M. L. Ludwig
Crystal Structure Of Reduced Thioredoxin Reductase From Escherichia Coli: Structural Flexibility In The Isoalloxazine Ring Of The Flavin Adenine Dinucleotide Cofactor.
Protein Sci. V. 8 2366 1999
PubMed-ID: 10595539
(for further references see the PDB file header)

Molecule 1 - THIOREDOXIN REDUCTASE
	Chains	:	A
	EC Number	:	1.6.4.5
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Cellular Location	:	CYTOPLASM
	Expression System Gene	:	TRXB
	Expression System Plasmid	:	PTRR301
	Expression System Strain	:	A326
	Expression System Taxid	:	562
	Expression System Vector	:	PSL350
	Gene	:	TRXB
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562
	Other Details	:	FAD AND ACTIVE SITE DISULFIDE (CYS 135 AND CYS 138) REDUCED BY SODIUM DITHIONITE AFTER CRYSTALLIZATION
	Other Details - Source	:	TRXB-STRAIN

		1
Asymmetric Unit	:	A
Biological Unit 1 (2x)	:	A

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 1)

No.	Name	Count	Type	Full Name
1	FAD	1	Ligand/Ion	FLAVIN-ADENINE DINUCLEOTIDE

Biological Unit 1 (1, 2)

No.	Name	Count	Type	Full Name
1	FAD	2	Ligand/Ion	FLAVIN-ADENINE DINUCLEOTIDE

Asymmetric Unit (1, 1)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	GLY A:12 , SER A:13 , GLY A:14 , PRO A:15 , ALA A:16 , TYR A:23 , THR A:35 , GLY A:36 , MET A:37 , GLU A:38 , GLY A:41 , GLN A:42 , LEU A:43 , THR A:46 , VAL A:49 , ASN A:51 , HIS A:83 , ILE A:84 , ALA A:111 , THR A:112 , GLY A:113 , SER A:133 , ALA A:134 , CYS A:138 , ASN A:248 , GLY A:285 , ASP A:286 , ARG A:293 , GLN A:294 , ALA A:295 , SER A:298 , HOH A:617 , HOH A:620 , HOH A:640 , HOH A:643 , HOH A:644 , HOH A:668	BINDING SITE FOR RESIDUE FAD A 500

(no "SS Bond" information available for 1CL0)

Asymmetric Unit

No.	Residues
1	Arg A:92	-	Pro A:93

(no "SAP(SNP)/Variant" information available for 1CL0)

Asymmetric Unit (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PYRIDINE_REDOX_2	PS00573	Pyridine nucleotide-disulphide oxidoreductases class-II active site.	TRXB_ECOLI	136-156	1	A:135-155

Biological Unit 1 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PYRIDINE_REDOX_2	PS00573	Pyridine nucleotide-disulphide oxidoreductases class-II active site.	TRXB_ECOLI	136-156	2	A:135-155

(no "Exon" information available for 1CL0)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
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Chain A from PDB  Type:PROTEIN  Length:317
 aligned with TRXB_ECOLI | P0A9P4 from UniProtKB/Swiss-Prot  Length:321

    Alignment length:317
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       
           TRXB_ECOLI     2 GTTKHSKLLILGSGPAGYTAAVYAARANLQPVLITGMEKGGQLTTTTEVENWPGDPNDLTGPLLMERMHEHATKFETEIIFDHINKVDLQNRPFRLNGDNGEYTCDALIIATGASARYLGLPSEEAFKGRGVSACATCDGFFYRNQKVAVIGGGNTAVEEALYLSNIASEVHLIHRRDGFRAEKILIKRLMDKVENGNIILHTNRTLEEVTGDQMGVTGVRLRDTQNSDNIESLDVAGLFVAIGHSPNTAIFEGQLELENGYIKVQSGIHGNATQTSIPGVFAAGDVMDHIYRQAITSAGTGCMAALDAERYLDGLA 318
               SCOP domains d1cl0a1 A:1-118,A:245-317 Thioredoxin reductase                                                                       d1cl0a2 A:119-244 Thioredoxin reductase                                                                                       d1cl0a1 A:1-118,A:245-317 Thioredoxin reductase                           SCOP domains
               CATH domains 1cl0A01 A:1-116,A:245-315  [code=3.50.50.60, no name defined]                                                       1cl0A02 A:117-244  [code=3.50.50.60, no name defined]                                                                           1cl0A01 A:1-116,A:245-315  [code=3.50.50.60, no name defined]          -- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeeeeeeee..hhhhhhhhhhhhh.....eee......hhhhhh.............hhhhhhhhhhhhhhhh..eee.....eee.....eeee....eeeeeeeee...eee....hhhhhhhh...ee.hhhhhhhhhh..eeeee..hhhhhhhhhhhh....eeeeee.......hhhhhhhhhhhhhh..eeeee..eeeeeeee..eeeeeeee........eeee..eeee...eee.hhhhh....ee..ee.................eee.hhhhh....hhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------PYRIDINE_REDOX_2     ------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1cl0 A   1 GTTKHSKLLILGSGPAGYTAAVYAARANLQPVLITGMEKGGQLTTTTEVENWPGDPNDLTGPLLMERMHEHATKFETEIIFDHINKVDLQNRPFRLNGDNGEYTCDALIIATGASARYLGLPSEEAFKGRGVSACATCDGFFYRNQKVAVIGGGNTAVEEALYLSNIASEVHLIHRRDGFRAEKILIKRLMDKVENGNIILHTNRTLEEVTGDQMGVTGVRLRDTQNSDNIESLDVAGLFVAIGHSPNTAIFEGQLELENGYIKVQSGIHGNATQTSIPGVFAAGDVMDHIYRQAITSAGTGCMAALDAERYLDGLA 317
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Asymmetric Unit

Classes(

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Folds(

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Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: Alpha and beta proteins (a/b) (23833)

Fold: FAD/NAD(P)-binding domain (331)

Superfamily: FAD/NAD(P)-binding domain (331)

Family: FAD/NAD-linked reductases, N-terminal and central domains (92)

Protein domain: Thioredoxin reductase (6)

Escherichia coli [TaxId: 562] (5)

1a	d1cl0a1	A:1-118,A:245-317
1b	d1cl0a2	A:119-244

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

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Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: 3-Layer(bba) Sandwich (528)

Topology: FAD/NAD(P)-binding domain (373)

Homologous Superfamily: [code=3.50.50.60, no name defined] (373)

Escherichia coli. Organism_taxid: 562. (10)

1a	1cl0A01	A:1-116,A:245-315
1b	1cl0A02	A:117-244

(no "Pfam Domain" information available for 1CL0)

Asymmetric Unit(hide GO term definitions)

Chain A (TRXB_ECOLI | P0A9P4)

molecular function
	GO:0050660	flavin adenine dinucleotide binding	Interacting selectively and non-covalently with FAD, flavin-adenine dinucleotide, the coenzyme or the prosthetic group of various flavoprotein oxidoreductase enzymes, in either the oxidized form, FAD, or the reduced form, FADH2.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0004791	thioredoxin-disulfide reductase activity	Catalysis of the reaction: NADP(+) + thioredoxin = H(+) + NADPH + thioredoxin disulfide.
biological process
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0019430	removal of superoxide radicals	Any process, acting at the cellular level, involved in removing superoxide radicals (O2-) from a cell or organism, e.g. by conversion to dioxygen (O2) and hydrogen peroxide (H2O2).
cellular component
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0005829	cytosol	The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

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