Crystal structure of a fimbrial protein (BVU_2522) from Bacteroides vulgatus ATCC 8482 at 2.55 A resolution

Joint Center for Structural Genomics (JCSG)

A Distinct Type of Pilus from the Human Microbiome.

Vertical focusing mirror; double crystal Si(111) monochromator

GE(MSE)TE(MSE)NPDTNRTIGLDVYTEVQTRGTETTTSTLKANAGFGIFAYQTSSAGWNSEKGNTTPNF(MSE)YNEH
ATWTSDSWGYTNLRFWPIDDKKITFFAYAPYESKPEVGTDQKITLSGQNAKGAPTITFEVKTSNNWKD(MSE)IDLVTDC
HTAIQDQTNESNKGTVQFKFSHVLTQIANIKVKPDVNLGTDTKIFVTGLKLDPGSTTLYNKAVYKFDNDTWEAISPDASY
FSTEQDLSDFLNKTTTDQWGYNKSSINVSDDQNATALFSDTEALYFIPVNNKNGTTNAGDLKLKINYDIVTKVTDTSNLT
STITNKEVSLPKNTFKKGTKHTYVLTIK(MSE)NAIKITVEDN(MSE)EGWTDDSDSDINVEK

GEMTEMNPDTNRTIGLDVYTEVQTRGTETTTSTLKANAGFGIFAYQTSSAGWNSEKGNTTPNFMYNEHATWTSDSWGYTN
LRFWPIDDKKITFFAYAPYESKPEVGTDQKITLSGQNAKGAPTITFEVKTSNNWKDMIDLVTDCHTAIQDQTNESNKGTV
QFKFSHVLTQIANIKVKPDVNLGTDTKIFVTGLKLDPGSTTLYNKAVYKFDNDTWEAISPDASYFSTEQDLSDFLNKTTT
DQWGYNKSSINVSDDQNATALFSDTEALYFIPVNNKNGTTNAGDLKLKINYDIVTKVTDTSNLTSTITNKEVSLPKNTFK
KGTKHTYVLTIKMNAIKITVEDNMEGWTDDSDSDINVEK

0.20M sodium chloride, 2.00M ammonium sulfate, 0.1M sodium cacodylate pH 6.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

THE CONSTRUCT (22-379) WAS EXPRESSED WITH A PURIFICATION TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS REMOVED WITH TEV PROTEASE LEAVING ONLY A GLYCINE (0) FOLLOWED BY THE TARGET SEQUENCE.

1. 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. 2. ATOM RECORD CONTAINS SUM OF TLS AND RESIDUAL B FACTORS. ANISOU RECORD CONTAINS SUM OF TLS AND RESIDUAL U FACTORS. 3. THE MAD PHASES WERE USED AS RESTRAINTS DURING REFINEMENT. 4. SULFATE(SO4) AND CHLORIDE (CL) IONS MODELED WERE PRESENT IN CRYSTALLIZATION CONDITIONS. 5. RAMACHANDRAN OUTLIER (A357) IS SUPPORTED BY DENSITY.

CRYSTAL PACKING ANALYSIS SUGGESTS THE ASSIGNMENT OF A MONOMER AS THE SIGNIFICANT OLIGOMERIZATION STATE.

fimbrial protein, PF13149 family, DUF3988, Structural Genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-BIOLOGY, CELL ADHESION

EMTEMNPDTNRTIGLDVYTEVQTRGTETTTSTLKANAGFGIFAYQTSSAGWNSEKGNTTPNFMYNEHATWTSDSWGYTNL
RFWPIDDKKITFFAYAPYESKPEVGTDQKITLSGQNAKGAPTITFEVKTSNNWKDMIDLVTDCHTAIQDQTNESNKGTVQ
FKFSHVLTQIANIKVKPDVNLGTDTKIFVTGLKLDPGSTTLYNKAVYKFDNDTWEAISPDASYFSTEQDLSDFLNKTTTD
QWGYNKSSINVSDDQNATALFSDTEALYFIPVNNKNGTTNAGDLKLKINYDIVTKVTDTSNLTSTITNKEVSLPKNTFKK
GTKHTYVLTIKMNAIKITVEDNMEGWTDDSDSDINVEK