Of the ten plasminogen-binding proteins identified with the ligand affinity method, only one (phosphoglycerate kinase) was predicted to contain a carboxyl-terminal lysine, suggesting that plasminogen binding to a majority of the surface receptors could be mediated in part by internal lysine residues, as demonstrated by the inhibition of plasminogen binding by the lysine analog εACA (Fig. 3C).
This protein has no protease activity and is presumed to have roles in cell adhesion or as a receptor (with several binding proteins identified), particularly in the nervous system since the ADAM22 null mouse displays ataxia and peripheral nerve hypomyelination [ 20].
Bartels, S.J. et al. A SILAC-based screen for methyl-CpG binding proteins identifies RBP-J as a DNA methylation and sequence-specific binding protein.
Importantly, the M-type receptors also bind with several mammalian sPLA2 [ 31, 36], suggesting that these proteins are the endogenous ligands for these receptors, and possibly for the collection of binding proteins initially identified with venom sPLA2.
When MCCs were maximized, NAD-binding proteins were identified with 95.34% accuracy, 57.88% sensitivity, 97.64% specificity, and an MCC of 0.57.
After isolating AGAA-box binding proteins, the eluted proteins were identified with Nano-HPLC/tandem MS-coupled detection.
Although proteins interacting with the intracellular loops of GPCRs have already been described, most of the proteins identified as binding partners of GPCRs associate with their cytosolic carboxy (C -terminal tail (5).
In contrast to these results, no chaperones or protein binding genes were identified with elevated dN/dS along the clade C lineage.
The remaining components of this hypothetical sucrose transporter (i.e., the membrane protein 1 and the substrate-binding protein) cannot be identified with reference only to A. variabilis based on our data, because the CUT1-related genes are not clustered in the A. variabilis genome.
Among the proteins identified included vitamin D binding protein (VDBP), aldolase A (aldo A), and apolipoproteinE (apoE).
