3.A.1.1.48
The lacto-N-biose I (LNB; Gal β-1,3-GlcNAc)/galacto-N-biose (GNB; Gal β-1,3-GalNAc) transporter.  The solute-binding protein crystallizes only in the presence of LNB or GNB, and it was therefore named GNB/LNB-binding protein (GL-BP) (Wada et al. 2007; Suzuki et al. 2008; Asakuma et al. 2011). Isothermal titration calorimetry measurements revealed that GL-BP specifically binds LNB and GNB with K(d) values of 0.087 and 0.010 μM, respectively, and the binding process is enthalpy-driven. The crystal structures of GL-BP complexed with LNB, GNB, and lacto-N-tetraose (Galbeta1-3GlcNAcbeta1Suzuki et al. 2008; Asakuma et al. 2011). Isothermal titration calorimetry measurements revealed that GL-BP specifically binds LNB and GNB with K(d) values of 0.087 and 0.010 μM, respectively, and the binding process is enthalpy-driven. The crystal structures of GL-BP complexed with LNB, GNB, and lacto-N-tetraose (Galbeta1-3GlcNAcbeta1-3Galbeta1-4Glc) were determined.  The MalF and MalG membrahe proteinAsakuma et al. 2011). Isothermal titration calorimetry measurements revealed that GL-BP specifically binds LNB and GNB with K(d) values of 0.087 and 0.010 μM, respectively, and the binding process is enthalpy-driven. The crystal structures of GL-BP complexed with LNB, GNB, and lacto-N-tetraose (Galbeta1-3GlcNAcbeta1-3Galbeta1-4Glc) were determined.  The MalF and MalG membrahe proteins are encoded adjacent to the gene for GL-BP, but the ATPase was not identified.