Structure of Greyhound hemoglobin: origin of high oxygen affinity

This study presents the crystal structure of Greyhound hemoglobin (GrHb) determined to 1.9 Å resolution.

Structural and functional studies of mycobacterial IspD enzymes

Two structure determinations of M. smegmatis IspD are reported: one in complex with CTP and the other in complex with CMP. In addition, the enzymatic characterization of the M. tuberculosis homologue and the structure of this enzyme in complex with CTP are reported.

High-resolution structure of exo-arabinanase from Penicillium chrysogenum

Crystal structures of the exo-α-1,5-L-arabinanase Abnx from P. chrysogenum 31B and of its complex with arabinobiose were determined at high resolutions of 1.14 and 1.04 Å, respectively.

The structure of the PERK kinase domain suggests the mechanism for its activation

The endoplasmic reticulum-localized transmembrane kinase PERK is one of three major ER stress transducers. The crystal structure of PERK's kinase domain has been determined to 2.8 Å resolution.

Network approach for capturing ligand-induced subtle global changes in protein structures

Network representation of protein structures and analysis in terms of network parameters provide efficient tools to capture conformational changes in atomistic detail in a global milieu.

X-ray crystal structure and small-angle X-ray scattering of sheep liver sorbitol de­hydrogenase

The X-ray crystal structure and a small-angle X-ray scattering solution structure of sheep liver sorbitol dehydrogenase have been determined. The details of the interactions that enable the tetramer scaffold to be the functional biological unit have been analyzed.

Structure of HLA-A*0301 in complex with a peptide of proteolipid protein: insights into the role of HLA-A alleles in susceptibility to multiple sclerosis

The structure of the human major histocompatability (MHC) class I molecule HLA-A*0301 (HLA-A3) in complex with a nonameric peptide (KLIETYFSK) has been determined by X-­ray crystallography to 2.7 Å resolution.

Structure of a two-CAP-domain protein from the human hookworm parasite Necator americanus

The first structure of a two-CAP-domain protein, Na-ASP-1, from the major human hookworm parasite N. americanus refined to a resolution limit of 2.2 Å is presented.

Pi sampling: a methodical and flexible approach to initial macromolecular crystallization screening

Pi sampling, derived from the incomplete factorial approach, is an effort to maximize the diversity of macromolecular crystallization conditions and to facilitate the preparation of 96-condition initial screens.

Structure of human dual-specificity phosphatase 27 at 2.38 Å resolution

The X-ray crystal structure of human dual-specificity phosphatase 27 (DUSP27) is reported at 2.38 Å resolution.

Structural basis for compound C inhibition of the human AMP-activated protein kinase α2 subunit kinase domain

AMP-activated protein kinase (AMPK) functions as a sensor to maintain energy balance and is therefore a potential target for drug design against metabolic syndrome. The crystal structure of the complex between the phosphorylated-state mimic T172D mutant AMPK α2 kinase domain and a selective inhibitor, compound C, has been determined, revealing the unique inhibitor-binding mode of this protein kinase.

Involvement of the distal Arg residue in Cl⁻ binding of midge larval haemoglobin

Crystal structures of midge larval haemoglobin under high salt concentrations at acidic pH were determined, which indicated that Cl⁻ binding to haem iron results in a swinging movement of the distal Arg residue in this haemoglobin. Preliminary molecular-dynamics simulations of the haemoglobin also indicated that the movement of the Arg side chain was dependent on anionic ligand binding.

Macromolecular Crystallization and Crystal Perfection