This domain can be found in many bacterial hypothetical proteins. The structures of , PDB:3hsa, and , PDB:3dcx, show similarities to the PH or pleckstrin homology domain. First evidence of PH-like domains in bacteria suggests role in cell envelope stress response [].
This entry represents the C terminus of bacterial poly(3-hydroxybutyrate) (PHB) de-polymerase. This degrades PHB granules to oligomers and monomers of 3-hydroxy-butyric acid.
This entry describes a group of lipases, including bacterial depolymerases for poly(3-hydroxybutyrate) (PHB) []and related polyhydroxyalkanoates (PHA), as well as acetyl xylan esterases [], and feruloyl esterases from fungi [].
The proteins this domain is found in are typically involved in regulating polymer accumulation in bacteria, for example the production of poly-beta-hydroxybutyrate (PHB) which is formed via the polymerisation of D(-)-3-hydroxybutyryl-CoA []. The function ofthis domain is unknown.
Members of this family are transcriptional regulatory proteins found in the vicinity of poly-beta-hydroxybutyrate (PHB) operons in several species of Bacillus. This protein appears to have repressor activity modulated by PHB itself. This protein belongs to the larger PadR family.
The band-7 protein family comprises a diverse set of membrane-bound proteins characterised by the presence of a conserved domain, the band-7 domain, also known as SPFH or PHB domain []. The exact function of the band-7 domain is not known, but examples from animal and bacterial stomatin-type proteins demonstrate binding to lipids and the ability to assemble into membrane-bound oligomers that form putative scaffolds []. A variety of proteins belong to this family. These include the prohibitins, cytoplasmic anti-proliferative proteins and stomatin, an erythrocyte membrane protein. Bacterial HflC protein also belongs to this family.Note: Band 4.1 and Band 7 proteins refer to human erythrocyte membrane proteins separated by SDS polyacrylamide gels and stained with coomassie blue [].
The band-7 protein family comprises a diverse set of membrane-bound proteins characterised by the presence of a conserved domain, the band-7 domain, also known as SPFH or PHB domain []. The exact function of the band-7 domain is not known, but examples from animal and bacterial stomatin-type proteins demonstrate binding to lipids and the ability to assemble into membrane-bound oligomers that form putative scaffolds []. A variety of proteins belong to this family. These include the prohibitins, cytoplasmic anti-proliferative proteins and stomatin, an erythrocyte membrane protein. Bacterial HflC protein also belongs to this family.Note: Band 4.1 and Band 7 proteins refer to human erythrocyte membrane proteins separated by SDS polyacrylamide gels and stained with coomassie blue [].
Phasins (or granule-associate proteins) are surface proteins found covering Polyhydroxyalkanoate (PHA) storage granules in bacteria. Polyhydroxyalkanoates are linear polyesters produced by bacterial fermentation of sugar or lipids for the purpose of storing carbon and energy, and are accumulated as intracellular granules by many bacteria under unfavorable conditions, enhancing their fitness and stress resistance []. The layer of phasins stabilises the granules and prevents coalescence of separated granules in the cytoplasm and nonspecific binding of other proteins to the hydrophobic surfaces of the granules. For example, in Ralstonia eutropha (strain ATCC 17699/H16/DSM 428/Stanier 337) (Cupriavidus necator (strain ATCC 17699 / H16 / DSM 428 / Stanier 337)), the major surface protein of polyhydroxybutyrate (PHB) granules is phasin PhaP1(Reu), which occurs along with three homologues (PhaP2, PhaP3, and PhaP4) that have the capacity to bind to PHB granules but are present at minor levels [, ]. These four phasins lack a highly conserved domain but share homologous hydrophobic regions. This entry describes a group of phasins that associate with polyhydroxyalkanoate (PHA) inclusions, the most common of which consist of polyhydroxybutyrate (PHB).
Phasins (or granule-associate proteins) are surface proteins found covering Polyhydroxyalkanoate (PHA) storage granules in bacteria. Polyhydroxyalkanoates are linear polyesters produced by bacterial fermentation of sugar or lipids for the purpose of storing carbon and energy, and are accumulated as intracellular granules by many bacteria under unfavorable conditions, enhancing their fitness and stress resistance []. The layer of phasins stabilises the granules and prevents coalescence of separated granules in the cytoplasm and nonspecific binding of other proteins to the hydrophobic surfaces of the granules. For example, in Ralstonia eutropha (strain ATCC 17699/H16/DSM 428/Stanier 337) (Cupriavidus necator (strain ATCC 17699 / H16 / DSM 428 / Stanier 337)), the major surface protein of polyhydroxybutyrate (PHB) granules is phasin PhaP1(Reu), which occurs along with three homologues (PhaP2, PhaP3, and PhaP4) that have the capacity to bind to PHB granules but are present at minor levels [, ]. These four phasins lack a highly conserved domain but share homologous hydrophobic regions. Members of this entry are encoded in polyhydroxyalkanoic acid storage system regions in a number of Vibrio species, including Vibrio cholerae V52, Photobacterium profundum SS9, Acinetobacter sp., and Aeromonas hydrophila. Members appear distantly related to the phasin family, see: and .
Phasins (or granule-associate proteins) are surface proteins found covering Polyhydroxyalkanoate (PHA) storage granules in bacteria. Polyhydroxyalkanoates are linear polyesters produced by bacterial fermentation of sugar or lipids for the purpose of storing carbon and energy, and are accumulated as intracellular granules by many bacteria under unfavorable conditions, enhancing their fitness and stress resistance []. The layer of phasins stabilises the granules and prevents coalescence of separated granules in the cytoplasm and nonspecific binding of other proteins to the hydrophobic surfaces of the granules. For example, in Ralstonia eutropha (strain ATCC 17699/H16/DSM 428/Stanier 337) (Cupriavidus necator (strain ATCC 17699 / H16 / DSM 428 / Stanier 337)), the major surface protein of polyhydroxybutyrate (PHB) granules is phasin PhaP1(Reu), which occurs along with three homologues (PhaP2, PhaP3, and PhaP4) that have the capacity to bind to PHB granules but are present at minor levels [, ]. These four phasins lack a highly conserved domain but share homologous hydrophobic regions. This entry describes a group of phasins associated with polyhydroxyalkanoate (PHA) inclusions, the most common of which consist of polyhydroxybutyrate (PHB). However, the member from Magnetospirillum sp. (strain AMB-1) is called a magnetic particle membrane-specific GTPase.
Phasins (or granule-associate proteins) are surface proteins found covering Polyhydroxyalkanoate (PHA) storage granules in bacteria. Polyhydroxyalkanoates are linear polyesters produced by bacterial fermentation of sugar or lipids for the purpose of storing carbon and energy, and are accumulated as intracellular granules by many bacteria under unfavorable conditions, enhancing their fitness and stress resistance []. The layer of phasins stabilises the granules and prevents coalescence of separated granules in the cytoplasm and nonspecific binding of other proteins to the hydrophobic surfaces of the granules. For example, in Ralstonia eutropha (strain ATCC 17699/H16/DSM 428/Stanier 337) (Cupriavidus necator (strain ATCC 17699 / H16 / DSM 428 / Stanier 337)), the major surface protein of polyhydroxybutyrate (PHB) granules is phasin PhaP1(Reu), which occurs along with three homologues (PhaP2, PhaP3, and PhaP4) that have the capacity to bind to PHB granules but are present at minor levels [, ]. These four phasins lack a highly conserved domain but share homologous hydrophobic regions. This entry represents a family of phasins that are part of the polyhydroxyalkanoate synthesis machinery []. Members of this family are related to .
The band-7 protein family comprises a diverse set of membrane-bound proteins characterised by the presence of a conserved domain, the band-7 domain, also known as SPFH or PHB domain. The exact function of the band-7 domain is not known, but examples from animal and bacterial stomatin-type proteins demonstrate binding to lipids and the ability to assemble into membrane-bound oligomers that form putative scaffolds [].A variety of proteins belong to the band-7 family. These include the stomatins, prohibitins, flottins and the HflK/C bacterial proteins. Eukaryotic band 7 proteins tend to be oligomeric and are involved in membrane-associated processes. Stomatins are involved in ion channel function, prohibitins are involved in modulating the activity of a membrane-bound FtsH protease and the assembly of mitochondrial respiratory complexes, and flotillins are involved in signal transduction and vesicle trafficking [].Stomatin, also known as human erythrocyte membrane protein band 7.2b [], was first identified in the band 7 region of human erythrocyte membrane proteins. It is an oligomeric, monotopic membrane protein associated with cholesterol-rich membranes/lipid rafts. Human stomatin is ubiquitously expressed in all tissues; highly in hematopoietic cells, relatively low in brain. It is associated with the plasma membrane and cytoplasmic vesicles of fibroblasts, epithelial and endothelial cells [].Stomatin is believed to be involved in regulating monovalent cation transport through lipid membranes. Absence of the protein in hereditary stomatocytosis is believed to be the reason for the leakage of Na+and K+ions into and from erythrocytes []. Stomatin is also expressed in mechanosensory neurons, where it may interact directly with transduction components, including cation channels [].Stomatin proteins have been identified in various organisms, including Caenorhabditis elegans. There are nine stomatin-like proteins in C. elegans, MEC-2 being the one best characterised []. In mammals, other stomatin family members are stomatin-like proteins SLP1, SLP2 and SLP3, and NPHS2 (podocin), which display selective expression patterns []. Stomatin family members are oligomeric, they mostly localise to membrane domains, and in many cases have been shown to modulate ion channel activity.The stomatins and prohibitins, and to a lesser extent flotillins, are highly conserved protein families and are found in a variety of organisms ranging from prokaryotes to higher eukaryotes, whereas HflK and HflC homologues are only present in bacteria [].This entry represents the stomatins and stomatin-like proteins, including podicin, from a wide range of eukaryotes, bacteria, archaea and viruses. It excludes the HflK and HflC proteins, prohibitins and flotillins.
The band-7 protein family comprises a diverse set of membrane-bound proteins characterised by the presence of a conserved domain, the band-7 domain, also known as SPFH or PHB domain. The exact function of the band-7 domain is not known, but examples from animal and bacterial stomatin-type proteins demonstrate binding to lipids and the ability to assemble into membrane-bound oligomers that form putative scaffolds [].A variety of proteins belong to the band-7 family. These include the stomatins, prohibitins, flottins and the HflK/C bacterial proteins. Eukaryotic band 7 proteins tend to be oligomeric and are involved in membrane-associated processes. Stomatins are involved in ion channel function, prohibitins are involved in modulating the activity of a membrane-bound FtsH protease and the assembly of mitochondrial respiratory complexes, and flotillins are involved in signal transduction and vesicle trafficking [].Stomatin, also known as human erythrocyte membrane protein band 7.2b [], was first identified in the band 7 region of human erythrocyte membrane proteins. It is an oligomeric, monotopic membrane protein associated with cholesterol-rich membranes/lipid rafts. Human stomatin is ubiquitously expressed in all tissues; highly in hematopoietic cells, relatively low in brain. It is associated with the plasma membrane and cytoplasmic vesicles of fibroblasts, epithelial and endothelial cells [].Stomatin is believed to be involved in regulating monovalent cation transport through lipid membranes. Absence of the protein in hereditary stomatocytosis is believed to be the reason for the leakage of Na+and K+ions into and from erythrocytes []. Stomatin is also expressed in mechanosensory neurons, where it may interact directly with transduction components, including cation channels [].Stomatin proteins have been identified in various organisms, including Caenorhabditis elegans. There are nine stomatin-like proteins in C. elegans, MEC-2 being the one best characterised []. In mammals, other stomatin family members are stomatin-like proteins SLP1, SLP2 and SLP3, and NPHS2 (podocin), which display selective expression patterns []. Stomatin family members are oligomeric, they mostly localise to membrane domains, and in many cases have been shown to modulate ion channel activity.The stomatins and prohibitins, and to a lesser extent flotillins, are highly conserved protein families and are found in a variety of organisms ranging from prokaryotes to higher eukaryotes, whereas HflK and HflC homologues are only present in bacteria [].This entry matches Stomatin, HflK and HflC proteins.
