>cd04105 SR_beta Signal recognition particle receptor, beta subunit (SR-beta). SR-beta and SR-alpha form the heterodimeric signal recognition particle (SRP or SR) receptor that binds SRP to regulate protein translocation across the ER membrane. Nascent polypeptide chains are synthesized with an N-terminal hydrophobic signal sequence that binds SRP54, a component of the SRP. SRP directs targeting of the ribosome-nascent chain complex (RNC) to the ER membrane via interaction with the SR, which is localized to the ER membrane. The RNC is then transferred to the protein-conducting channel, or translocon, which facilitates polypeptide translation across the ER membrane or integration into the ER membrane. SR-beta is found only in eukaryotes; it is believed to control the release of the signal sequence from SRP54 upon binding of the ribosome to the translocon. High expression of SR-beta has been observed in human colon cancer, suggesting it may play a role in the development of this typ

Probab=96.00  E-value=0.0051  Score=39.13  Aligned_cols=34  Identities=26%  Similarity=0.397  Sum_probs=23.9

Q ss_pred             EEEEECCCCCCHHHHHHHHHHHCCCEEEEEEECCCCCC
Q ss_conf             99998799999899999998518981799860278889
Q gi|254780132|r    4 IFVLIGASGVGKTTIAKQVVLNSEYLVMPVGVTTRRPR   41 (186)
Q Consensus         4 iivi~GpsGsGK~tl~~~L~~~~~~~~~~v~~TTR~~R   41 (186)
T Consensus         2 tvLl~Gl~~aGKT~Lf~~L~~~--~~--~~T~tS~~~n   35 (203)
T cd04105           2 TVLLLGPSDSGKTALFTKLTTG--KY--RSTVTSIEPN   35 (203)
T ss_pred             EEEEECCCCCCHHHHHHHHHCC--CC--CCCCCCCCCC
T ss_conf             5999907999899999999749--98--8877888786