Enables guanyl-nucleotide exchange factor activity. Involved in SRP-dependent cotranslational protein targeting to membrane. Located in nuclear inner membrane. Part of Ssh1 translocon complex. Orthologous to human SEC61B (SEC61 translocon subunit beta).
SGD Description
Ssh1p-Sss1p-Sbh2p complex component; involved in protein translocation into the endoplasmic reticulum; SBH2 has a paralog, SBH1, that arose from the whole genome duplication