Involved in regulation of actin and microtubule organization. Part of a WAVE complex that activates the Arp2/3 complex. Arabidopsis thaliana (taxid: 3702)
>sp|Q8RW98|BRK1_MAIZE Protein BRICK1 OS=Zea mays GN=BRK1 PE=2 SV=1
Promotes multiple, actin-dependent cell polarization events in the developing leaf epidermis. Involved in regulation of actin and microtubule organization. Part of a WAVE complex that activates the Arp2/3 complex.
The WASH complex is present at the surface of endosomes and recruits and activates the Arp2/3 complex to induce actin polymerisation. The WASH complex plays a key role in the fission of tubules that serve as transport intermediates during endosome sorting []. The WASH complex's subunit structure: F-actin-capping protein subunit alpha (CAPZA1, CAPZA2 or CAPZA3), F-actin-capping protein subunit beta (CAPZB), WASH (WASH1, WASH2P, WASH3P, WASH4P, WASH5P or WASH6P), FAM21 (FAM21A, FAM21B or FAM21C), KIAA1033, KIAA0196 (strumpellin) and CCDC53.
>KOG4496 consensus Predicted coiled-coil protein [Function unknown]
>PF10393 Matrilin_ccoil: Trimeric coiled-coil oligomerisation domain of matrilin; InterPro: IPR019466 This entry represents a short domain found the matrilin (cartilage matrix) proteins
It forms a coiled coil structure and contains a single cysteine residue at its start which is likely to form a di-sulphide bridge with a corresponding cysteine in an upstream EGF domain (IPR006209 from INTERPRO), thereby spanning the VWA domain of the protein (IPR002035 from INTERPRO).This domain is likely to be responsible for protein trimerisation []. ; PDB: 1AQ5_C.
>PF10805 DUF2730: Protein of unknown function (DUF2730); InterPro: IPR020269 This entry represents a family of various hypothetical proteins
The proteins, which include HI1498 and Gp25, from phage Mu, are currently uncharacterised.
>PF04380 BMFP: Membrane fusogenic activity; InterPro: IPR007475 BMFP consists of two structural domains, a coiled-coil C-terminal domain via which the protein self-associates as a trimer, and an N-terminal domain disordered at neutral pH but adopting an amphipathic alpha-helical structure in the presence of phospholipid vesicles, high ionic strength, acidic pH or SDS
BMFP interacts with phospholipid vesicles though the predicted amphipathic alpha-helix induced in the N-terminal half of the protein and promotes aggregation and fusion of vesicles in vitro.
>PF04380 BMFP: Membrane fusogenic activity; InterPro: IPR007475 BMFP consists of two structural domains, a coiled-coil C-terminal domain via which the protein self-associates as a trimer, and an N-terminal domain disordered at neutral pH but adopting an amphipathic alpha-helical structure in the presence of phospholipid vesicles, high ionic strength, acidic pH or SDS
BMFP interacts with phospholipid vesicles though the predicted amphipathic alpha-helix induced in the N-terminal half of the protein and promotes aggregation and fusion of vesicles in vitro.
>TIGR01837 PHA_granule_1 poly(hydroxyalkanoate) granule-associated protein
This model describes a domain found in some proteins associated with polyhydroxyalkanoate (PHA) granules in a subset of species that have PHA inclusion granules. Included are two tandem proteins of Pseudomonas oleovorans, PhaI and PhaF, and their homologs in related species. PhaF proteins have a low-complexity C-terminal region with repeats similar to AAAKP.
>PF05531 NPV_P10: Nucleopolyhedrovirus P10 protein; InterPro: IPR008702 This family consists of several nucleopolyhedrovirus P10 proteins which are thought to be involved in the morphogenesis of the polyhedra []
>PF11471 Sugarporin_N: Maltoporin periplasmic N-terminal extension; InterPro: IPR021570 This N-terminal domain is found in members of the sugar porin family 1
B.3 from TC, They are related to LamB - the well characterised maltoporin of Escherichia coli for which the three-dimensional structures with and without its substrate have been obtained by X-ray diffraction. The protein consists of an 18 beta-stranded beta-barrel in contrast to proteins of the general bacterial porin family (GBP) and the Rhodobacter PorCa Porin (RPP) family which consist of 16 beta-stranded beta-barrels. Although maltoporin contains a wider beta-barrel than the porins of the GBP and RPP families (1.B.1 from TC and 1.B.7 from TC), it exhibits a narrower channel, showing only 5% of the ionic conductance of the latter porins.
>PF10152 DUF2360: Predicted coiled-coil domain-containing protein (DUF2360); InterPro: IPR019309 This entry represents a component of the WASH complex
The WASH complex is present at the surface of endosomes and recruits and activates the Arp2/3 complex to induce actin polymerisation. The WASH complex plays a key role in the fission of tubules that serve as transport intermediates during endosome sorting []. The WASH complex's subunit structure: F-actin-capping protein subunit alpha (CAPZA1, CAPZA2 or CAPZA3), F-actin-capping protein subunit beta (CAPZB), WASH (WASH1, WASH2P, WASH3P, WASH4P, WASH5P or WASH6P), FAM21 (FAM21A, FAM21B or FAM21C), KIAA1033, KIAA0196 (strumpellin) and CCDC53.
>PF03105 SPX: SPX domain; InterPro: IPR004331 The SPX domain is named after SYG1/Pho81/XPR1 proteins
This 180 residue length domain is found at the amino terminus of a variety of proteins. In the yeast protein SYG1, the N terminus directly binds to the G- protein beta subunit and inhibits transduction of the mating pheromone signal [] suggesting that all the members of this family are involved in G-protein associated signal transduction. The C-terminal of these proteins often have an EXS domain (IPR004342 from INTERPRO) []. The N-termini of several proteins involved in the regulation of phosphate transport, including the putative phosphate level sensors PHO81 from Saccharomyces cerevisiae and NUC-2 from Neurospora crassa, are also members of this family [, ]. NUC-2 contains several ankyrin repeats (IPR002110 from INTERPRO). Several members of this family are the XPR1 proteins: the xenotropic and polytropic retrovirus receptor confers susceptibility to infection with Murine leukemia virus (MLV) []. The similarity between SYG1, phosphate regulators and XPR1 sequences has been previously noted, as has the additional similarity to several predicted proteins, of unknown function, from Drosophila melanogaster, Arabidopsis thaliana, Caenorhabditis elegans, Schizosaccharomyces pombe, and Saccharomyces cerevisiae [, ]. In addition, given the similarities between XPR1 and SYG1 and phosphate regulatory proteins, it has been proposed that XPR1 might be involved in G-protein associated signal transduction [, , ] and may itself function as a phosphate sensor [].
This model describes the PspB protein of the psp (phage shock protein) operon, as found in Escherichia coli and many related species. Expression of a phage protein called secretin protein IV, and a number of other stresses including ethanol, heat shock, and defects in protein secretion trigger sigma-54-dependent expression of the phage shock regulon. PspB is both a regulator and an effector protein of the phage shock response.
All members of this protein family are the phage shock protein PspC. These proteins contain a PspC domain, as do other members of the larger family of proteins described by Pfam model pfam04024. The phage shock regulon is restricted to the Proteobacteria and somewhat sparsely distributed there. It is expressed, under positive control of a sigma-54-dependent transcription factor, PspF, which binds and is modulated by PspA. Stresses that induce the psp regulon include phage secretin overexpression, ethanol, heat shock, and protein export defects.
>COG3937 Uncharacterized conserved protein [Function unknown]
>PF05597 Phasin: Poly(hydroxyalcanoate) granule associated protein (phasin); InterPro: IPR008769 Polyhydroxyalkanoates (PHAs) are storage polyesters synthesised by various bacteria as intracellular carbon and energy reserve material
PHAs are accumulated as water-insoluble inclusions within the cells. This family consists of the phasins PhaF and PhaI which act as a transcriptional regulator of PHA biosynthesis genes. PhaF has been proposed to repress expression of the phaC1 gene and the phaIF operon.
>cd04769 HTH_MerR2 Helix-Turn-Helix DNA binding domain of MerR2-like transcription regulators
Helix-turn-helix (HTH) transcription regulator MerR2 and related proteins. MerR2 in Bacillus cereus RC607 regulates resistance to organomercurials. The MerR family transcription regulators have been shown to mediate responses to stress including exposure to heavy metals, drugs, or oxygen radicals in eubacterial and some archaeal species. They regulate transcription by reconfiguring the spacer between the -35 and -10 promoter elements. A typical MerR regulator is comprised of two distinct domains that harbor the regulatory (effector-binding) site and the active (DNA-binding) site. Their N-terminal domains are homologous and contain a DNA-binding winged HTH motif, while the C-terminal domains are often dissimilar and bind specific coactivator molecules such as metal ions, drugs, and organic substrates.
>PF09177 Syntaxin-6_N: Syntaxin 6, N-terminal; InterPro: IPR015260 Members of this entry, which are found in the amino terminus of various SNARE proteins, adopt a structure consisting of an antiparallel three-helix bundle
Their exact function has not been determined, though it is known that they regulate the SNARE motif, as well as mediate various protein-protein interactions involved in membrane-transport []. ; GO: 0048193 Golgi vesicle transport, 0016020 membrane; PDB: 1LVF_B 2C5I_T 2C5J_A 2C5K_T 4DND_A.
>PF04740 LXG: LXG domain of WXG superfamily; InterPro: IPR006829 This group of putative transposases is found in Gram-positive bacteria, mostly Bacillus members and is thought to be a Cytosolic protein
However, we have also found a Bacillus subtilis bacteriophage SPbetac2 homologue (O64023 from SWISSPROT), possibly arising as a result of horizontal transfer. More information about these proteins can be found at Protein of the Month: Transposase [].
>cd01108 HTH_CueR Helix-Turn-Helix DNA binding domain of CueR-like transcription regulators
Helix-turn-helix (HTH) transcription regulators CueR and ActP, copper efflux regulators. In Bacillus subtilis, copper induced CueR regulates the copZA operon, preventing copper toxicity. In Rhizobium leguminosarum, ActP controls copper homeostasis; it detects cytoplasmic copper stress and activates transcription in response to increasing copper concentrations. These proteins are comprised of two distinct domains that harbor the regulatory (effector-binding) site and the active (DNA-binding) site. Their conserved N-terminal domains contain winged HTH motifs that mediate DNA binding, while the C-terminal domains have two conserved cysteines that define a monovalent copper ion binding site. These proteins share the N-terminal DNA binding domain with other transcription regulators of the MerR superfamily that promote transcription by reconfiguring the spacer between the -35 and -10 promoter elements
>PF05278 PEARLI-4: Arabidopsis phospholipase-like protein (PEARLI 4); InterPro: IPR007942 This family contains several phospholipase-like proteins from Arabidopsis thaliana and other members of the Streptophyta which are homologous to PEARLI 4
>3ljm_A Coil Ser L9C; de novo design, three stranded coiled coil, APO, de novo Pro; 1.36A {Synthetic} PDB: 2jgo_A 1cos_A 3h5g_A 3h5f_A 3pbj_A 2x6p_C 1coi_A
