Figure 2. Relationships between apparent disulfide bonding patterns in lazarillo, ApoD, B.

Figure 2

Relationships between apparent disulfide bonding patterns in lazarillo, ApoD, B. fungorum2, and G. violaceus lipocalins. Amino acid residues in the surface loop between β-strands G and H are shown for lazarillo, and as a consensus sequence for the ApoDs; however, the intermolecular disulfide bond with ApoA2 is unique to human ApoD. The apparent disulfide bond flanking β-strands B and C in the G. violaceus lipocalin is present in the majority of Clade IB lipocalins. The putative secondary structural elements are indicated as β-sheet (blue arrows), α-helix (red rectangles), or signal sequences (green rectangles). Diglyceride moieties of the lipid anchors in Blc and lazarillo are shown as black and yellow rectangles. The sugars of the GPI anchor of lazarillo are mannose (green squares), glucosamine (red circle), and inositol (blue diamond).

From: Bacterial Lipocalins: Origin, Structure, and Function

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