Annotations: 8UCQ

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF09324	Mon2/Sec7/BIG1-like, HDS (Sec7-like_HDS)	Mon2/Sec7/BIG1-like, HDS	This entry represents a HDS (homology downstream of Sec7) domain found towards the C-terminal of guanine nucleotide exchange factors involved Golgi transport, such as budding yeast protein Sec7, protein Mon2 and BIG1-like proteins [1,2]. Sec7 is invo ...	This entry represents a HDS (homology downstream of Sec7) domain found towards the C-terminal of guanine nucleotide exchange factors involved Golgi transport, such as budding yeast protein Sec7, protein Mon2 and BIG1-like proteins [1,2]. Sec7 is involved in the secretory pathway as a protein binding scaffold for the COPII-COPI protein switch for maturation of the VTC intermediate compartments for Golgi compartment biogenesis [3]. Sec7 has four HDS1-4 domains, which act to integrate the signals from several small GTPases, including Arf1 itself, to switch Sec7 from a strongly autoinhibited to a strongly auto activated form [2].	Domain
A [auth B], B [auth A]	PF12783	Mon2/Sec7/BIG1-like, HUS domain (Sec7-like_HUS)	Mon2/Sec7/BIG1-like, HUS domain	The full-length Sec7 functions proximally in the secretory pathway as a protein binding scaffold for the coat protein complexes COPII-COPI. The COPII-COPI-protein switch is necessary for maturation of the vesicular-tubular cluster, VTC, intermediate ...	The full-length Sec7 functions proximally in the secretory pathway as a protein binding scaffold for the coat protein complexes COPII-COPI. The COPII-COPI-protein switch is necessary for maturation of the vesicular-tubular cluster, VTC, intermediate compartments for Golgi compartment biogenesis. This N-terminal domain however does not appear to be binding either of the COP or the ARF [2]. This is the HUS (homology upstream of Sec7) domain of Sec7 and related proteins such as protein Mon2 and BIG1-like proteins, which plays a regulatory role [3,4] together with DCB domain (Pfam:PF16213).	Domain
A [auth B], B [auth A]	PF20252	BIG2 C-terminal domain (BIG2_C)	BIG2 C-terminal domain	This presumed domain is found at the C-terminus of BIG2 the brefeldin A-inhibited guanine nucleotide-exchange protein. The function of this region is unknown.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	SEC7 domain-containing protein	GTPase regulator activity enzyme regulator activity guanyl-nucleotide exchange factor activity nucleoside-triphosphatase regulator activity molecular function regulator activity	cellular response to stimulus regulation of biological process regulation of signaling small GTPase-mediated signal transduction regulation of cellular process response to stimulus signaling regulation of small GTPase mediated signal transduction biological regulation ARF protein signal transduction regulation of signal transduction intracellular signal transduction cell communication regulation of intracellular signal transduction regulation of response to stimulus cellular response to stimulus regulation of biological process regulation of signaling small GTPase-mediated signal transduction regulation of cellular process response to stimulus signaling regulation of small GTPase mediated signal transduction biological regulation ARF protein signal transduction regulation of signal transduction intracellular signal transduction cell communication regulation of intracellular signal transduction regulation of response to stimulus regulation of ARF protein signal transduction intracellular signaling cassette regulation of cell communication cellular process signal transduction protein localization establishment of protein localization cellular localization nitrogen compound transport transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization	membrane-bounded organelle intracellular anatomical structure Golgi apparatus subcompartment Golgi apparatus organelle subcompartment cellular anatomical entity intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle trans-Golgi network cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR016024	Armadillo-type fold	Homologous Superfamily
A [auth B], B [auth A]	IPR046455	Sec7/BIG1-like, C-terminal domain	Domain
A [auth B], B [auth A]	IPR000904	Sec7 domain	Domain
A [auth B], B [auth A]	IPR032691	Mon2/Sec7/BIG1-like, HUS domain	Domain
A [auth B], B [auth A]	IPR023394	Sec7, C-terminal domain superfamily	Homologous Superfamily
A [auth B], B [auth A]	IPR032629	Mon2/Sec7/BIG1-like, dimerisation and cyclophilin-binding domain	Domain
A [auth B], B [auth A]	IPR015403	Mon2/Sec7/BIG1-like, HDS	Domain
A [auth B], B [auth A]	IPR035999	Sec7 domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.