Crystal structure of a dimeric ferredoxin-like protein (jcvi_pep_1096665735785) from uncultured marine organism at 1.70 A resolution

Joint Center for Structural Genomics (JCSG)

Crystal structure of hypothetical protein (JCVI_PEP_1096665735785) from an environmental metagenome (unidentified marine microbe), Sorcerer II Global Ocean Sampling experiment at 1.70 A resolution

Single crystal Si(111) bent monochromator (horizontal focusing)

G(MSE)FAGSIP(MSE)YIRVVSITAQSKLQFD(MSE)TVTYFENVWSPKVISLGAISAEFVQSNENSG(MSE)YIIHYP
DKQTAISVFDKIKPEVDEVRTQNRIQITEGKRLFRVD

GMFAGSIPMYIRVVSITAQSKLQFDMTVTYFENVWSPKVISLGAISAEFVQSNENSGMYIIHYPDKQTAISVFDKIKPEV
DEVRTQNRIQITEGKRLFRVD

SYNTHETIC GENE: The gene product was based on JCVI_PEP_1096665735785 from the Sorcerer II Global Ocean Sampling experiment

0.2M Li2SO4, 2.5M NaCl, 0.1M Acetate pH 4.5, VAPOR DIFFUSION, SITTING DROP, NANODROP, temperature 277K

BIOMOLECULE: 1,2
THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT
WHICH CONSISTS OF 2 CHAINS. SEE REMARK 350 FOR
INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S).
SIZE EXCLUSION CHROMATOGRAPHY WITH STATIC LIGHT SCATTERING
SUPPORTS THE ASSIGNMENT OF A DIMER AS A BIOLOGICALLY
SIGNIFICANT OLIGOMERIZATION STATE.

SEQUENCE
(1) THE CONSTRUCT WAS EXPRESSED WITH A PURIFICATION
TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS REMOVED WITH TEV
PROTEASE LEAVING ONLY A GLYCINE (0) FOLLOWED BY THE
TARGET SEQUENCE.
(2) THE SEQUENCE OF THE PROTEIN WAS NOT AVAILABLE IN THE
UNP DATABASE AT THE TIME OF PROCESSING.
(3) PRODUCT OF THE EXPRESSED SYNTHETIC GENE WAS BASED ON
THE PREDICTED SEQUENCE OF ACCESSION ID
JCVI_PEP_1096665735785 FROM THE J. CRAIG VENTER INSTITUTE.

1. HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS.
2. A MET-INHIBITION PROTOCOL WAS USED FOR SELENOMETHIONINE
INCORPORATION DURING PROTEIN EXPRESSION. THE OCCUPANCY
OF THE SE ATOMS IN THE MSE RESIDUES WAS REDUCED TO 0.75
FOR THE REDUCED SCATTERING POWER DUE TO PARTIAL S-MET INCORPORATION.
3. AN EDO MOLECULE FROM THE CRYO SOLUTION IS MODELED.
4. ATOM RECORDS CONTAIN RESIDUAL B FACTORS ONLY.

SIZE EXCLUSION CHROMATOGRAPHY WITH STATIC LIGHT SCATTERING SUPPORTS THE ASSIGNMENT OF A DIMER AS A BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE.

Metagenomics target, structural genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-2, unknown function