issue contents
November 2006 issue
Cover illustration: Superoxide dismutase from Perkinsus marinus (p. 1072).
protein structure communications
The previously reported structure of the copper-containing amine oxidase from A. globiformis has been refined in two different crystal forms at resolutions of 1.55 and 2.20 Å.
The crystal structure of human adipocyte lipid-binding protein (aP2) with a bound palmitate is reported at 1.5 Å resolution.
PDB reference: adipocyte lipid-binding protein, 2hnx, r2hnxsf
Open access
E. coli bacterioferritin was crystallized in a novel crystal form from different conditions and the structure was solved. The crystals belonged to space group P213 and diffracted to a resolution of 2.5 Å.
PDB reference: bacterioferritin, 2htn, r2htnsf
Crystal structure of the ligand-binding domain of androgen receptor in complex with LGD2226.
PDB reference: AR LBD–LGD2226, 2hvc, r2hvcsf
PmSOD1 and PmSOD2, two superoxide dismutases from the protozoan parasite P. marinus, have been crystallized and their structures have been solved to 1.8 and 2.3 Å resolution, respectively.
X-ray crystallographic analysis of human inosine triphosphate pyrophosphohydrolase provided the secondary structure and active-site structure at 1.6 Å resolution in an orthorhombic crystal form. The structure gives a framework for future structure–function studies employing site-directed mutagenesis and for the identification of substrate/product-binding sites.
PDB reference: human inosine triphosphate pyrophosphatase, 2i5d, r2i5dsf
Open access
The structure of UDP-3-O-acyl-N-acetylglucosamine deacetylase (LpxC) in complex with UDP is reported. The complex allows for a description of how the enzyme recognizes and binds a nucleotide moiety and enables the construction of an LpxC-substrate model.
PDB reference: LpxC, 2j65, r2j65sf
The crystallization of GADPH from S. oleracea in two different space groups has been accomplished using GAPDH samples with unusually low purity levels. One crystal form is the same as a previously reported form, while the second represents a new form. The quality of the diffraction allowed the structure to be determined at a 3 Å resolution limit.
PDB reference: GADPH, 2hki, r2hkisf
crystallization communications
SoxY from C. limicola f. thiosulfatophilum is involved in thiosulfate metabolism. Crystallization, preliminary crystallographic analysis and phasing of this protein are presented.
Glucosamine-6-phosphate N-acetyltransferase from human liver was expressed, purified and crystallized. Diffraction data have been collected to 2.6 Å resolution.
The crystallization and preliminary X-ray data of Canavalia gladiata lectin (CGL) and C. maritima lectin (CML) complexed with Man(α1-2)Man(α1)OMe, Man(α1-3)Man(α1)OMe and Man(α1-4)Man(α1)OMe in two crystal forms [the complexes with Man(α1-3)Man(α1)OMe and Man(α1-4)Man(α1)OMe crystallized in space group P32 and those with Man(α1-2)Man(α1)OMe crystallized in space group I222], which differed from those of the native proteins (P21212 for CML and C222 for CGL), are reported.
A preparation of replication terminator protein (RTP) of B. subtilis and a 37-base-pair TerI sequence (comprising two binding sites for RTP) has been purified and crystallized.
α-11 giardin from the intestinal protozoan parasite, G. lamblia has been cloned, expressed, purified and crystallized under two different conditions and in two different space groups. Crystals from the first condition diffracted to 1.1 Å and belong to a primitive orthorhombic space group and crystals obtained in the second condition diffracted to 2.93 Å and belong to a primitive monoclinic space group.
A probable copper-ion tolerance protein from the plant pathogen X. campestris has been overexpressed in E. coli, purified and crystallized.
M. tuberculosis dihydrodipicolinate synthase, the enzyme that catalyzes the first unique reaction in the L-lysine biosynthesis pathway, has been cloned, expressed, purified and crystallized and the crystals have been characterized by X-ray diffraction.
Human recombinant tumour suppressor S100A2 and a mutant lacking cysteine residues have been purified and crystallized. Only the crystals of the mutant protein diffracted to appropriate resolution and a complete data set was recorded at 1.7 Å.
Open access
A novel blue protein from frog nests has been crystallized.
An N-terminal acetyltransferase ARD1 subunit-related protein (Ta0058) and an N-terminal acetyltransferase-related protein (Ta1140) from T. acidophilum were crystallized. X-ray diffraction data were collected to 2.17 and 2.40 Å, respectively.
Phosphopantetheine adenylyltransferase from En. faecalis was crystallized and X-ray diffraction data were collected to 2.70 Å resolution.
Open access
Crystals of PrnB, the second enzyme in pyrrolnitrin biosynthesis are reported.
A core fragment of Arabidopsis thaliana COP9 signalosome (CSN) subunit 7 was expressed in Escherichia coli. The protein was purified to homogeneity and crystallized.
The Corynebacterium glutamicum NTA monooxygenase component A protein, which plays the central role in NTA biodegradation, was crystallized. The initial X-ray crystallographic characterization is reported.
Human S100A13 protein was cloned, expressed, purified and crystallized by the hanging-drop vapour-diffusion method. The crystals obtained belonged to space group P212121 and diffracted to a resolution of 1.8 Å.
A putative transposase from T. acidophilum encoded by the Ta0474 gene was crystallized and X-ray diffraction data were collected to 1.78 Å.
The transcriptional regulator AcrR from Escherichia coli has been cloned, overexpressed, purified and crystallized and X-ray diffraction data have been collected to a resolution of 2.5 Å.
Open access
An aromatic prenyltransferase (CloQ) from S. roseochromogenes that is implicated in clorobiocin biosynthesis has been crystallized in space group I4122. X-ray data to 2.2 Å resolution were collected in-house.
Yeast Sfh1p, a close homolog of the Sec14p phosphatidylinositol transfer protein, was crystallized in the absence of detergent. X-ray data have been collected to 2.5 Å.
Crystals of mitochondrial thioredoxin Trx3 from S. cerevisiae were obtained and diffraction data were collected to 2.0 Å resolution.
Open access
The crystallization and data collection of topoisomerase IV from S. aureus is described. Phasing by molecular replacement proved difficult owing to the presence of translational NCS and strategies used to overcome this are discussed.