4QYS | pdb_00004qys

Deposited: 2014-07-25 Released: 2015-02-18
Deposition Author(s): Busch, F., Rajendran, C., Loeffler, P., Merkl, R., Sterner, R.

Experimental Data Snapshot

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.1 of the entry. See complete history.

(2014) Biochemistry 53: 6078-6083

PubMed Abstract:
The rapid increase of the number of sequenced genomes asks for the functional annotation of the encoded enzymes. We used a combined computational-structural approach to determine the function of the TrpB2 subgroup of the tryptophan synthase β chain/β chain-like TrpB1-TrpB2 family (IPR023026). The results showed that TrpB2 enzymes are O-phospho-l-serine dependent tryptophan synthases, whereas TrpB1 enzymes catalyze the l-serine dependent synthesis of tryptophan. We found a single residue being responsible for the different substrate specificities of TrpB1 and TrpB2 and confirmed this finding by mutagenesis studies and crystallographic analysis of a TrpB2 enzyme with bound O-phospho-l-serine.

Organizational Affiliation

Institute of Biophysics and Physical Biochemistry, University of Regensburg , Universitätsstrasse 31, D-93053 Regensburg, Germany.

Macromolecule Content

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tryptophan synthase beta chain 2	A [auth B], B [auth A]	442	Saccharolobus solfataricus P2	Mutation(s): 0 Gene Names: trpB2, SSO1145 EC: 4.2.1.20
UniProt
Find proteins for Q97TX6 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)) Explore Q97TX6 Go to UniProtKB: Q97TX6
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q97TX6
Sequence Annotations Expand
Reference Sequence

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PLP Query on PLP Download:Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	PYRIDOXAL-5'-PHOSPHATE C₈ H₁₀ N O₆ P NGVDGCNFYWLIFO-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]
PLR Query on PLR Download:Ideal Coordinates CCD File SDF format, chain C [auth B] MOL2 format, chain C [auth B] mmCIF format, chain C [auth B]	C [auth B]	(5-HYDROXY-4,6-DIMETHYLPYRIDIN-3-YL)METHYL DIHYDROGEN PHOSPHATE C₈ H₁₂ N O₅ P RBCOYOYDYNXAFA-UHFFFAOYSA-N		Interactions Focus chain C [auth B] Interactions & Density Focus chain C [auth B]
SEP Query on SEP Download:Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A] mmCIF format, chain E [auth A]	E [auth A]	PHOSPHOSERINE C₃ H₈ N O₆ P BZQFBWGGLXLEPQ-REOHCLBHSA-N		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]