A Novel Protein Fold Forms an Intramolecular Lock to Stabilize the Tertiary Structure of Streptococcus mutans Adhesin P1

An intramolecular lock facilitates folding and stabilizes the tertiary structure of Streptococcus mutans adhesin P1.

VGTQTGNPATNLPEAQGSASKEAEQSQNQAGETNGSIPVEVPKTDLDQAAKDAKSAGVNVVQDADVNKGTVKTAEEAVQK
ETEIKEDYTKQAEDIKKTTDQYKSDVAAHEAEVAKIKAKNQ

QDLPTPPSVPTVHFHYFKLAVQPQVNKEIRNNNDINIDRTLVAKQSVVKFQLKTADLPAGRDETTSFVLVDPLPSGYQFN
PEATKAASPGFDVTYDNATNTVTFKATAATLATFNADLTKSVATIYPTVVGQVLNDGATYKNNFTLTVNDAYGIKSNVVR
VTTPGKPNDPDNPNNNYIKPTKVNKNENGVVIDGKTVLAGSTNYYELTWDLDQYKNDRSSADTIQKGFYYVDDYPEEALE
LRQDLVKITDANGNEVTGVSVDNYTNLEAAPQEIRDVLSKAGIRPKGAFQIFRADNPREFYDTYVKTGIDLKIVSPMVVK
KQMGQTGGSYENQAYQIDFGNGYASNIVINNVPKINPKKDVTLTLDPADTNNVDGQTIPLNTVFNYRLIGGIIPANHSEE
LFKYNFYDDYDQTGDHYTGQYKVFAKVDITLKNGVIIKSGTELTQYTTAEVDTTKGAITIKFKEAFLRSVSIDSAFQAES
YIQMKRIAVGTFENTYINTVNGVTYSS

Crystals were routinely grown at room temperature using the hanging drop vapor diffusion method by mixing 4uL of concentrated NA1/P3C with a mother liquor solution of 24% polyethylene glycol (PEG) 4000, 150mM ammonium phosphate, at pH 7.5. Crystals formed as large plate clusters within approximately 2 weeks. Following initial crystal growth, 8uL of a solution containing 45% PEG 4000, 100mM ammonium phosphate, at pH 7.5 was added to the crystal drop to facilitate the removal of water from the crystal and improve diffraction quality by producing a more compact and ordered crystal lattice

National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)

chain 'B' and (resid 1034 through 1188 )

chain 'B' and (resid 1189 through 1289 )

chain 'B' and (resid 1290 through 1323 )

chain 'B' and (resid 1324 through 1399 )

chain 'B' and (resid 1400 through 1456 )

chain 'B' and (resid 1457 through 1486 )

Adhesin, Streptococcus, Intramolecular Lock, Complex, CELL ADHESION