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Conserved domains on  [gi|937113190|ref|WP_054551371|]
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MULTISPECIES: succinate dehydrogenase, hydrophobic membrane anchor protein [Pseudoalteromonas]

Protein Classification

succinate dehydrogenase, hydrophobic membrane anchor protein( domain architecture ID 10131267)

succinate dehydrogenase, hydrophobic membrane anchor protein (SdhD), together with subunit SdhC, acts to anchor the catalytic components of succinate dehydrogenase to the cytoplasmic membrane

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
SQR_TypeC_SdhD cd03494
Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) ...
 15-113 1.04e-32

Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. E. coli SQR, a member of this subfamily, reduces the high potential quinine, ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. SdhD and SdhC are the two transmembrane proteins of bacterial SQRs. They contain heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the membrane anchor subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of quinone is an essential feature of respiration, allowing transfer of electrons between respiratory complexes.


:

Pssm-ID: 239574  Cd Length: 99  Bit Score: 110.00  E-value: 1.04e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  15 DFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKLRAVLG 94
Cdd:cd03494    1 DWLVQRVTAVIMALYTIFLVGFLLASPPLTYEAWSGLFSSLWMKIFTLLALLALLLHAWIGLWDILTDYVKPAGLRLLLQ 80

                         90
                 ....*....|....*....
gi 937113190  95 FVLNLMAVAYVAIGLIVLW 113
Cdd:cd03494   81 VLIILVLFGYLIWGIQILW 99
 
Name Accession Description Interval E-value
SQR_TypeC_SdhD cd03494
Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) ...
 15-113 1.04e-32

Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. E. coli SQR, a member of this subfamily, reduces the high potential quinine, ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. SdhD and SdhC are the two transmembrane proteins of bacterial SQRs. They contain heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the membrane anchor subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of quinone is an essential feature of respiration, allowing transfer of electrons between respiratory complexes.


Pssm-ID: 239574  Cd Length: 99  Bit Score: 110.00  E-value: 1.04e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  15 DFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKLRAVLG 94
Cdd:cd03494    1 DWLVQRVTAVIMALYTIFLVGFLLASPPLTYEAWSGLFSSLWMKIFTLLALLALLLHAWIGLWDILTDYVKPAGLRLLLQ 80

                         90
                 ....*....|....*....
gi 937113190  95 FVLNLMAVAYVAIGLIVLW 113
Cdd:cd03494   81 VLIILVLFGYLIWGIQILW 99
sdhD PRK09488
succinate dehydrogenase membrane anchor subunit;
1-115 8.32e-29

succinate dehydrogenase membrane anchor subunit;


Pssm-ID: 181901  Cd Length: 115  Bit Score: 100.58  E-value: 8.32e-29
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190   1 MVLNQATLKRDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVL 80
Cdd:PRK09488   1 MVSNASALGRNGVHDFILVRATAIVLTLYIIYMVGFFATSGELTYEVWRGFFASAFTKVFTLLALFSILIHAWIGMWQVL 80

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 937113190  81 TDYVKCAKLRAVLGFVLNLMAVAYVAIGLIVLWGV 115
Cdd:PRK09488  81 TDYVKPLALRLMLQLVIVVALVVYVIYGFVVVWGV 115
succ_dehyd_anc TIGR02968
succinate dehydrogenase, hydrophobic membrane anchor protein; In E. coli and many other ...
 9-113 1.45e-28

succinate dehydrogenase, hydrophobic membrane anchor protein; In E. coli and many other bacteria, two small, hydrophobic, mutually homologous subunits of succinate dehydrogenase, a TCA cycle enzyme, are SdhC and SdhD. This family is the SdhD, the hydrophobic membrane anchor protein. SdhC is apocytochrome b558, which also plays a role in anchoring the complex. [Energy metabolism, TCA cycle]


Pssm-ID: 274369  Cd Length: 105  Bit Score: 99.56  E-value: 1.45e-28
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190    9 KRDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAK 88
Cdd:TIGR02968   1 ARSGLRDWLLQRVTAVVLALYTIFLIGFLLALPGLTYEAWRALFAHPWMKIFTLLALLALLYHAWIGMRVVLEDYVKPEG 80

                          90       100
                  ....*....|....*....|....*
gi 937113190   89 LRAVLGFVLNLMAVAYVAIGLIVLW 113
Cdd:TIGR02968  81 LRLVLQVLIILFLVAYLIWGAFILW 105
SdhD COG2142
Succinate dehydrogenase, hydrophobic anchor subunit [Energy production and conversion];
10-115 4.01e-24

Succinate dehydrogenase, hydrophobic anchor subunit [Energy production and conversion];


Pssm-ID: 441745  Cd Length: 124  Bit Score: 88.73  E-value: 4.01e-24
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  10 RDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKL 89
Cdd:COG2142   17 KSGTHHWLLQRVTAVALVVLVLWFLFFLLSLPGADYAEVAAWFASPFWAILTLLFLLSALYHAWLGLRVVIEDYVHGTGL 96

                         90       100
                 ....*....|....*....|....*.
gi 937113190  90 RAVLGFVLNLMAVAYVAIGLIVLWGV 115
Cdd:COG2142   97 RLALLLLLTLALVALAAAGVFALLRI 122
 
Name Accession Description Interval E-value
SQR_TypeC_SdhD cd03494
Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) ...
 15-113 1.04e-32

Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. E. coli SQR, a member of this subfamily, reduces the high potential quinine, ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. Members of this subfamily are classified as Type C SQRs because they contain two transmembrane subunits and one heme group. SdhD and SdhC are the two transmembrane proteins of bacterial SQRs. They contain heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the membrane anchor subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of quinone is an essential feature of respiration, allowing transfer of electrons between respiratory complexes.


Pssm-ID: 239574  Cd Length: 99  Bit Score: 110.00  E-value: 1.04e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  15 DFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKLRAVLG 94
Cdd:cd03494    1 DWLVQRVTAVIMALYTIFLVGFLLASPPLTYEAWSGLFSSLWMKIFTLLALLALLLHAWIGLWDILTDYVKPAGLRLLLQ 80

                         90
                 ....*....|....*....
gi 937113190  95 FVLNLMAVAYVAIGLIVLW 113
Cdd:cd03494   81 VLIILVLFGYLIWGIQILW 99
sdhD PRK09488
succinate dehydrogenase membrane anchor subunit;
1-115 8.32e-29

succinate dehydrogenase membrane anchor subunit;


Pssm-ID: 181901  Cd Length: 115  Bit Score: 100.58  E-value: 8.32e-29
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190   1 MVLNQATLKRDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVL 80
Cdd:PRK09488   1 MVSNASALGRNGVHDFILVRATAIVLTLYIIYMVGFFATSGELTYEVWRGFFASAFTKVFTLLALFSILIHAWIGMWQVL 80

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 937113190  81 TDYVKCAKLRAVLGFVLNLMAVAYVAIGLIVLWGV 115
Cdd:PRK09488  81 TDYVKPLALRLMLQLVIVVALVVYVIYGFVVVWGV 115
succ_dehyd_anc TIGR02968
succinate dehydrogenase, hydrophobic membrane anchor protein; In E. coli and many other ...
 9-113 1.45e-28

succinate dehydrogenase, hydrophobic membrane anchor protein; In E. coli and many other bacteria, two small, hydrophobic, mutually homologous subunits of succinate dehydrogenase, a TCA cycle enzyme, are SdhC and SdhD. This family is the SdhD, the hydrophobic membrane anchor protein. SdhC is apocytochrome b558, which also plays a role in anchoring the complex. [Energy metabolism, TCA cycle]


Pssm-ID: 274369  Cd Length: 105  Bit Score: 99.56  E-value: 1.45e-28
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190    9 KRDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAK 88
Cdd:TIGR02968   1 ARSGLRDWLLQRVTAVVLALYTIFLIGFLLALPGLTYEAWRALFAHPWMKIFTLLALLALLYHAWIGMRVVLEDYVKPEG 80

                          90       100
                  ....*....|....*....|....*
gi 937113190   89 LRAVLGFVLNLMAVAYVAIGLIVLW 113
Cdd:TIGR02968  81 LRLVLQVLIILFLVAYLIWGAFILW 105
SdhD COG2142
Succinate dehydrogenase, hydrophobic anchor subunit [Energy production and conversion];
10-115 4.01e-24

Succinate dehydrogenase, hydrophobic anchor subunit [Energy production and conversion];


Pssm-ID: 441745  Cd Length: 124  Bit Score: 88.73  E-value: 4.01e-24
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  10 RDGVQDFVSLRATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKL 89
Cdd:COG2142   17 KSGTHHWLLQRVTAVALVVLVLWFLFFLLSLPGADYAEVAAWFASPFWAILTLLFLLSALYHAWLGLRVVIEDYVHGTGL 96

                         90       100
                 ....*....|....*....|....*.
gi 937113190  90 RAVLGFVLNLMAVAYVAIGLIVLWGV 115
Cdd:COG2142   97 RLALLLLLTLALVALAAAGVFALLRI 122
SQR_TypeC_SdhD_like cd03495
Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) ...
 20-112 1.77e-04

Succinate:quinone oxidoreductase (SQR) Type C subfamily, Succinate dehydrogenase D (SdhD) subunit-like; composed of predominantly uncharacterized bacterial proteins with similarity to the E. coli SdhD subunit. One characterized protein is the respiratory Complex II SdhD subunit of the only eukaryotic member, Reclinomonas americana. SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. It is also called succinate dehydrogenase or Complex II, and is part of the citric acid cycle and the aerobic respiratory chain. SQR is composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. E. coli SQR is classified as Type C SQRs because it contains two transmembrane subunits and one heme group. The SdhD and SdhC subunits are membrane anchor subunits containing heme and quinone binding sites. The two-electron oxidation of succinate in the flavoprotein active site is coupled to the two-electron reduction of quinone in the membrane anchor subunits via electron transport through FAD and three iron-sulfur centers. The reversible reduction of quinone is an essential feature of respiration, allowing transfer of electrons between respiratory complexes.


Pssm-ID: 239575  Cd Length: 100  Bit Score: 37.58  E-value: 1.77e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  20 RATALIISAYAIFIIGYFLCTPEVTFEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKCAKLRAVLGFVLNL 99
Cdd:cd03495    7 RVTAVALVPLVLWFVFSVALLLGASYAEVVAWLAHPFNAILLILTLVSAFYHARLGMQVVIEDYVHSEGLRLALIIAVKL 86

                         90
                 ....*....|...
gi 937113190 100 MAVAYVAIGLIVL 112
Cdd:cd03495   87 FAIATAAAGIFAI 99
SQR_QFR_TM cd03493
Succinate:quinone oxidoreductase (SQR) and Quinol:fumarate reductase (QFR) family, ...
 20-110 2.12e-04

Succinate:quinone oxidoreductase (SQR) and Quinol:fumarate reductase (QFR) family, transmembrane subunits; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol, while QFR catalyzes the reverse reaction. SQR, also called succinate dehydrogenase or Complex II, is part of the citric acid cycle and the aerobic respiratory chain, while QFR is involved in anaerobic respiration with fumarate as the terminal electron acceptor. SQRs may reduce either high or low potential quinones while QFRs oxidize only low potential quinols. SQR and QFR share a common subunit arrangement, composed of a flavoprotein catalytic subunit, an iron-sulfur protein and one or two hydrophobic transmembrane subunits. The structural arrangement allows efficient electron transfer between the catalytic subunit, through iron-sulfur centers, and the transmembrane subunit(s) containing the electron donor/acceptor (quinol or quinone). The reversible reduction of quinone is an essential feature of respiration, allowing the transfer of electrons between respiratory complexes. SQRs and QFRs can be classified into five types (A-E) according to the number of their hydrophobic subunits and heme groups. This classification is consistent with the characteristics and phylogeny of the catalytic and iron-sulfur subunits. Type E proteins, e.g. non-classical archael SQRs, contain atypical transmembrane subunits and are not included in this hierarchy. The heme and quinone binding sites reside in the transmembrane subunits. Although succinate oxidation and fumarate reduction are carried out by separate enzymes in most organisms, some bifunctional enzymes that exhibit both SQR and QFR activities exist.


Pssm-ID: 239573  Cd Length: 98  Bit Score: 37.26  E-value: 2.12e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 937113190  20 RATALIISAYAIFIIGYFLCTPEVT--FEAWQGLFSNLAMKGFTLITLVCIMVHTRIGLWQVLTDYVKC--AKLRAVLGF 95
Cdd:cd03493    4 RITGVALLLFLPLHLLGLLALLGGPyaFAEVVAFLSSPLGKLLYLLLLLALLYHALNGIRHLIWDYGKGleLKLRKALGY 83

                         90
                 ....*....|....*
gi 937113190  96 VLNLMAVAYVAIGLI 110
Cdd:cd03493   84 AVLALSVLLTVLLLF 98
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options: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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