SMART: Pfam domain Thaumatin

Thaumatin

PFAM accession number:	PF00314
Interpro abstract (IPR001938):	Thaumatin [ (PUBMED:7049841) ] is an intensely sweet-tasting protein, 100 000 times sweeter than sucrose on a molar basis [ (PUBMED:7049841) ], found in berries from Thaumatococcus daniellii, a tropical flowering plant known as Katemfe. It is induced by attack by viroids, which are single-stranded unencapsulated RNA molecules that do not code for protein. Thaumatin consists of about 200 residues and contains 8 disulphide bonds. Like other PR proteins, thaumatin is predicted to have a mainly beta structure, with a high content of beta-turns and little helix [ (PUBMED:7049841) ]. Several stress-induced proteins of plants have been found to be related to thaumatins: A maize alpha-amylase/trypsin inhibitor Two tobacco pathogenesis-related proteins: PR-R major and minor forms,which are induced after infection with viruses Salt-induced protein NP24 from tomato Osmotin, a salt-induced protein from tobacco[ (PUBMED:16666857) ] Osmotin-like proteins OSML13, OSML15 and OSML81 from potato [ (PUBMED:7630973) ] P21, a leaf protein from soybean PWIR2, a leaf protein from wheat [ (PUBMED:1650615) ] Zeamatin, a maize antifunal protein [ (PUBMED:7846159) ] This family is also referred to as pathogenesis-related group 5 (PR5), as many thaumatin-like proteins accumulate in plants in response to infection by a pathogen and possess antifungal activity [ (PUBMED:1463856) ]. The proteins are involved in systematically acquired resistance and stress response in plants, although their precise role is unknown [ (PUBMED:1463856) ]. The PR5K receptor protein kinase from Arabidopsis comprises an extracellular domain related to the PR5 proteins, and an intracellular protein-serine/threonine kinase domain [ (PUBMED:8637920) ].

PFAM accession number:

PF00314

Interpro abstract (IPR001938):

Thaumatin [ (PUBMED:7049841) ] is an intensely sweet-tasting protein, 100 000 times sweeter than sucrose on a molar basis [ (PUBMED:7049841) ], found in berries from Thaumatococcus daniellii, a tropical flowering plant known as Katemfe. It is induced by attack by viroids, which are single-stranded unencapsulated RNA molecules that do not code for protein.

Thaumatin consists of about 200 residues and contains 8 disulphide bonds. Like other PR proteins, thaumatin is predicted to have a mainly beta structure, with a high content of beta-turns and little helix [ (PUBMED:7049841) ]. Several stress-induced proteins of plants have been found to be related to thaumatins:

A maize alpha-amylase/trypsin inhibitor
Two tobacco pathogenesis-related proteins: PR-R major and minor forms,which are induced after infection with viruses
Salt-induced protein NP24 from tomato
Osmotin, a salt-induced protein from tobacco[ (PUBMED:16666857) ]
Osmotin-like proteins OSML13, OSML15 and OSML81 from potato [ (PUBMED:7630973) ]
P21, a leaf protein from soybean
PWIR2, a leaf protein from wheat [ (PUBMED:1650615) ]
Zeamatin, a maize antifunal protein [ (PUBMED:7846159) ]

This family is also referred to as pathogenesis-related group 5 (PR5), as many thaumatin-like proteins accumulate in plants in response to infection by a pathogen and possess antifungal activity [ (PUBMED:1463856) ]. The proteins are involved in systematically acquired resistance and stress response in plants, although their precise role is unknown [ (PUBMED:1463856) ]. The PR5K receptor protein kinase from Arabidopsis comprises an extracellular domain related to the PR5 proteins, and an intracellular protein-serine/threonine kinase domain [ (PUBMED:8637920) ].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry Thaumatin