>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=92.03  E-value=0.16  Score=27.41  Aligned_cols=21  Identities=19%  Similarity=0.289  Sum_probs=18.0

Q ss_pred             EEEEEECCCCCHHHHHHHHHH
Q ss_conf             699990798657899999999
Q gi|254780640|r   52 LTIVNGQNGYGKSSLSEAIEW   72 (110)
Q Consensus        52 ~~~i~G~Ng~GKStil~ai~~   72 (110)
T Consensus         2 tvLl~Gl~~aGKT~Lf~~L~~   22 (203)
T cd04105           2 TVLLLGPSDSGKTALFTKLTT   22 (203)
T ss_pred             EEEEECCCCCCHHHHHHHHHC
T ss_conf             599990799989999999974