5e5y

Quasi-racemic snakin-1 in P1 before radiation damage

spinqualitylabelsall models 5e5y, resolution 1.51Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5e5y is a 4 chain structure with sequence from Solanum tuberosum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.506Å Ligands: DAL, DAR, DAS, DCY, DGL, DHI, DIL, DLE, DLY, DPN, DPR, DSG, DSN, DTH, DTY, DVA, EDO, FMT, PHI Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SNAK1_SOLTU Has an antimicrobial activity. Causes a rapid aggregation of both Gram-positive and Gram-negative bacteria, but the antimicrobial activity is not correlated with the capacity to aggregate bacteria. Publication Abstract from PubMed Proteins from the GASA/snakin superfamily are common in plant proteomes and have diverse functions, including hormonal crosstalk, development, and defense. One 63-residue member of this family, snakin-1, an antimicrobial protein from potatoes, has previously been chemically synthesized in a fully active form. Herein the 1.5 A structure of snakin-1, determined by a novel combination of racemic protein crystallization and radiation-damage-induced phasing (RIP), is reported. Racemic crystals of snakin-1 and quasi-racemic crystals incorporating an unnatural 4-iodophenylalanine residue were prepared from chemically synthesized d- and l-proteins. Breakage of the C-I bonds in the quasi-racemic crystals facilitated structure determination by RIP. The crystal structure reveals a unique protein fold with six disulfide crosslinks, presenting a distinct electrostatic surface that may target the protein to microbial cell surfaces. Radiation Damage and Racemic Protein Crystallography Reveal the Unique Structure of the GASA/Snakin Protein Superfamily.,Yeung H, Squire CJ, Yosaatmadja Y, Panjikar S, Lopez G, Molina A, Baker EN, Harris PW, Brimble MA Angew Chem Int Ed Engl. 2016 May 4. doi: 10.1002/anie.201602719. PMID:27145301 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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