9.B.106 The Pock Size-determining Protein (PSDP) Family
The pock size-determining protein, SpdB, is encoded on plasmid pSN22 (Kataoka et al., 1991a). It may enhance efficiency of plasmid transfer (Kataoka et al., 1991b). It is under TraR control and has 325 aas and 4 N-terminal TMSs. Four SpdB proteins (SpdB1-SpdB4) have been idntified (Kataoka et al., 1994). The C-terminal hydrophilic domain is an Ala/Glu-rich domain that is similar to domains in other proteins such as TolA of E. coli (TC# 1.A.30.2.2). The SpdA (TC# 9.B.106.2.1) and SpdB proteins may function together. It appears that families 9.B.54, 9.B.106, and 9.B.148, all containing 4 TMS members, may be homologous.
This family belongs to the: Protein Kinase (PK) Superfamily.
References associated with 9.B.106 family:
Das, S. and E. Knust. (2017). Stardust, the Janus-faced partner of Crumbs. J. Cell Biol. 216: 1219-1221. 28416478
Kataoka, M., T. Seki, and T. Yoshida. (1991). Five genes involved in self-transmission of pSN22, a Streptomyces plasmid. J. Bacteriol. 173: 4220-4228. 2061295
Kataoka, M., T. Seki, and T. Yoshida. (1991). Regulation and function of the Streptomyces plasmid pSN22 genes involved in pock formation and inviability. J. Bacteriol. 173: 7975-7981. 1720772
Kataoka, M., Y.M. Kiyose, Y. Michisuji, T. Horiguchi, T. Seki, and T. Yoshida. (1994). Complete nucleotide sequence of the Streptomyces nigrifaciens plasmid, pSN22: genetic organization and correlation with genetic properties. Plasmid 32: 55-69. 7991673
Lin, H., W. Du, Y. Yang, K.S. Schumaker, and Y. Guo. (2014). A calcium-independent activation of the Arabidopsis SOS2-like protein kinase24 by its interacting SOS3-like calcium binding protein1. Plant Physiol. 164: 2197-2206. 24521877
Mendes, M.V., J.F. Aparicio, and J.F. Martín. (2000). Complete nucleotide sequence and characterization of pSNA1 from pimaricin-producing Streptomyces natalensis that replicates by a rolling circle mechanism. Plasmid 43: 159-165. 10686136