cation:proton antiporter family protein functions in maintaining cation homeostasis and the pH of actively metabolizing cells; it may also be involved in regulating cell volume
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH ...
12-547
0e+00
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH of actively metabolising cells. The molecular mechanisms of antiport are unclear. These antiporters contain 10-12 transmembrane regions (M) at the amino-terminus and a large cytoplasmic region at the carboxyl terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family.
The actual alignment was detected with superfamily member TIGR00840:
Pssm-ID: 470090 [Multi-domain] Cd Length: 559 Bit Score: 665.71 E-value: 0e+00
sodium/hydrogen exchanger 3; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC 2.A. ...
12-547
0e+00
sodium/hydrogen exchanger 3; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC 2.A.36)The CPA1 family is a large family of proteins derived from Gram-positive and Gram-negative bacteria, blue green bacteria, yeast, plants and animals.Transporters from eukaryotes have been functionally characterized, and all of these catalyze Na+:H+ exchange. Their primary physiological functions may be in(1) cytoplasmic pH regulation, extruding the H+ generated during metabolism, and (2) salt tolerance (in plants), due to Na+ uptake into vacuoles.This model is specific for the eukaryotic members members of this family. [Transport and binding proteins, Cations and iron carrying compounds]
Pssm-ID: 273294 [Multi-domain] Cd Length: 559 Bit Score: 665.71 E-value: 0e+00
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH ...
23-397
1.13e-73
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH of actively metabolising cells. The molecular mechanisms of antiport are unclear. These antiporters contain 10-12 transmembrane regions (M) at the amino-terminus and a large cytoplasmic region at the carboxyl terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family.
Pssm-ID: 425982 [Multi-domain] Cd Length: 377 Bit Score: 240.23 E-value: 1.13e-73
sodium/hydrogen exchanger 3; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC 2.A. ...
12-547
0e+00
sodium/hydrogen exchanger 3; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC 2.A.36)The CPA1 family is a large family of proteins derived from Gram-positive and Gram-negative bacteria, blue green bacteria, yeast, plants and animals.Transporters from eukaryotes have been functionally characterized, and all of these catalyze Na+:H+ exchange. Their primary physiological functions may be in(1) cytoplasmic pH regulation, extruding the H+ generated during metabolism, and (2) salt tolerance (in plants), due to Na+ uptake into vacuoles.This model is specific for the eukaryotic members members of this family. [Transport and binding proteins, Cations and iron carrying compounds]
Pssm-ID: 273294 [Multi-domain] Cd Length: 559 Bit Score: 665.71 E-value: 0e+00
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH ...
23-397
1.13e-73
Sodium/hydrogen exchanger family; Na/H antiporters are key transporters in maintaining the pH of actively metabolising cells. The molecular mechanisms of antiport are unclear. These antiporters contain 10-12 transmembrane regions (M) at the amino-terminus and a large cytoplasmic region at the carboxyl terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family.
Pssm-ID: 425982 [Multi-domain] Cd Length: 377 Bit Score: 240.23 E-value: 1.13e-73
Na+/H+ antiporter, bacterial form; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC ...
23-416
7.99e-39
Na+/H+ antiporter, bacterial form; The Monovalent Cation:Proton Antiporter-1 (CPA1) Family (TC 2.A.36) The CPA1 family is a large family of proteins derived from Gram-positive and Gram-negative bacteria, blue green bacteria, yeast, plants and animals. Transporters from eukaryotes have been functionally characterized, and all of these catalyze Na+:H+ exchange. Their primary physiological functions may be in (1) cytoplasmic pH regulation, extruding the H+ generated during metabolism, and (2) salt tolerance (in plants), due to Na+ uptake into vacuoles. This model is specific for the bacterial members of this family. [Transport and binding proteins, Cations and iron carrying compounds]
Pssm-ID: 129911 [Multi-domain] Cd Length: 525 Bit Score: 150.04 E-value: 7.99e-39
Regulatory region of Na+/H+ exchanger NHE binds to calmodulin; NEXCaM_BD is a coiled-coil ...
493-569
5.97e-05
Regulatory region of Na+/H+ exchanger NHE binds to calmodulin; NEXCaM_BD is a coiled-coil domain found as part of the regulatory, C-terminal region of the 12-14 TM sodium/proton exchangers (NHEs)2 of the solute carrier 9 (SLC9) family in all animal kingdoms. The C- lobe of CaM binds the first alpha-helix of the NHE, or NEXCaM_BD region, and the N-lobe of CaM binds the second helix of NEXCaM_BD.
Pssm-ID: 465214 Cd Length: 109 Bit Score: 42.39 E-value: 5.97e-05
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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