1qrr Summary

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CRYSTAL STRUCTURE OF SQD1 PROTEIN COMPLEX WITH NAD AND UDP-GLUCOSE

The structure was published by Mulichak, A.M., Theisen, M.J., Essigmann, B., Benning, C., and Garavito, R.M., in 1999 in a paper entitled "Crystal structure of SQD1, an enzyme involved in the biosynthesis of the plant sulfolipid headgroup donor UDP-sulfoquinovose." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.6 Å and deposited in 1999.

The experimental data on which the structure is based was not deposited.

The PDB entry contains the structure of sulfolipid biosynthesis (SQD1) PROTEIN. This molecule has the UniProt identifier O48917 (SQD1_ARATH)search. The sample contained 394 residues which is < 90% of the natural sequence. Out of 394 residues 384 were observed and are deposited in the PDB.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms homodimers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A sulfolipid biosynthesis (SQD1) PROTEIN O48917 (84-477) (SQD1_ARATH)search Arabidopsis thalianasearch < 90% 394 98%


This entry contains 1 unique UniProt protein:

UniProt accession Name Organism PDB
O48917 (84 - 477) sulfolipid biosynthesis (SQD1) PROTEIN Arabidopsis thaliana

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A Tyrosine-dependent oxidoreductasessearch NAD(P)-binding Rossmann-like Domainsearch, UDP-galactose 4-epimerase, domain 1search NAD dependent epimerase/dehydratase familysearch

Chain ID Molecular function (GO)
A (O48917) coenzyme bindingsearch catalytic activitysearch

Chain InterPro annotation
A NAD-dependent epimerase/dehydratase, N-terminal domainsearch NAD(P)-binding domainsearch