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    SDHD succinate dehydrogenase complex, subunit D, integral membrane protein [ Homo sapiens (human) ]

    Gene ID: 6392, updated on 22-May-2013
    Official Symbol
    SDHDprovided by HGNC
    Official Full Name
    succinate dehydrogenase complex, subunit D, integral membrane proteinprovided by HGNC
    Primary source
    HGNC:10683
    See related
    Ensembl:ENSG00000204370; HPRD:04069; MIM:602690; Vega:OTTHUMG00000166997
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Homo sapiens
    Lineage
    Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
    Also known as
    PGL; CBT1; CWS3; PGL1; QPs3; SDH4; cybS; CII-4
    Summary
    This gene encodes a member of complex II of the respiratory chain, which is responsible for the oxidation of succinate. The encoded protein is one of two integral membrane proteins anchoring the complex to the matrix side of the mitochondrial inner membrane. Mutations in this gene are associated with the formation of tumors, including hereditary paraganglioma. Transmission of disease occurs almost exclusively through the paternal allele, suggesting that this locus may be maternally imprinted. There are pseudogenes for this gene on chromosomes 1, 2, 3, 7, and 18. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2013]
    Location :
    11q23
    Sequence :
    Chromosome: 11; NC_000011.9 (111957571..111966518)
    See SDHD in Epigenomics, MapViewer

    Chromosome 11 - NC_000011.9Genomic Context describing neighboring genes Neighboring gene dihydrolipoamide S-acetyltransferase Neighboring gene PIH1 domain containing 2 Neighboring gene chromosome 11 open reading frame 57 Neighboring gene translocase of inner mitochondrial membrane 8 homolog B (yeast) Neighboring gene interleukin 18 (interferon-gamma-inducing factor) Neighboring gene testis expressed 12

    GeneRIFs: Gene References Into Functions What's a GeneRIF?

    Paragangliomas 1

    Summary from GeneReviews: Hereditary Paraganglioma-Pheochromocytoma Syndromes Go to GeneReviews

    Disease Characteristics
    Hereditary paraganglioma-pheochromocytoma (PGL/PCC) syndromes are characterized by paragangliomas (tumors that arise from neuroendocrine tissues symmetrically distributed along the paravertebral axis from the base of the skull to the pelvis) and by pheochromocytomas (paragangliomas that are confined to the adrenal medulla). Sympathetic paragangliomas hypersecrete catecholamines; parasympathetic paragangliomas are most often nonsecretory. Extra-adrenal parasympathetic paragangliomas are located predominantly in the skull base, neck, and upper medistinum; approximately 95% of such tumors are nonsecretory. In contrast, sympathetic extra-adrenal paragangliomas are generally confined to the lower mediastinum, abdomen, and pelvis, and are typically secretory. Pheochromocytomas, which arise from the adrenal medulla, typically hypersecrete catecholamines. Symptoms of PGL/PCC result either from mass effects or catecholamine hypersecretion (e.g., sustained or paroxysmal elevations in blood pressure, headache, episodic profuse sweating, forceful palpitations, pallor, and apprehension or anxiety). The risk for malignant transformation is greater for extra-adrenal sympathetic paragangliomas than for pheochromocytomas or skull base and neck paragangliomas.
    Diagnosis Testing
    The diagnosis of hereditary PGL/PCC syndromes is based on physical examination, family history, imaging studies, biochemical testing, and molecular genetic testing. SDHA, SDHB, SDHC and SDHD are four nuclear genes that encode the four subunits of the mitochondrial enzyme succinate dehydrogenase (SDH). A fifth nuclear gene, SDHAF2 (also known as SDH5) encodes a protein that appears to be required for flavination of another SDH subunit, SDHA. These are collectively known as the SDHx genes. Mutations in MAX predispose to PCC; a subset of individuals with mutations in MAX will also develop PGL. KIF1B and EGLN1 (formerly known as PHD2) have been reported to be associated with hereditary PGL/PCC, but their clinical significance is still unclear. Molecular genetic testing for disease-causing variants in SDHA, SDHB, SDHC, SDHD, SDHAF2, and MAX is clinically available.
    Genetic Counseling
    The hereditary PGL/PCC syndromes are inherited in an autosomal dominant manner. Mutations in SDHD (PGL1) demonstrate parent-of-origin effects and generally cause disease only when the mutation is inherited from the father. Initial data suggest that mutations in SDHAF2 (PGL2) and MAX exhibit parent-of-origin effects similar to those of mutations in SDHD. A proband with a hereditary PGL/PCC syndrome may have inherited the mutation from a parent or have a de novo mutation; the proportion of cases caused by de novo mutations is unknown. Each child of an individual with a hereditary PGL/PCC syndrome has a 50% chance of inheriting the disease-causing mutation. An individual who inherits a SDHD mutation from his/her mother is at a low but not negligible risk of developing disease; each of his/her offspring is at a 50% risk of inheriting the disease-causing allele. An individual who inherits an SDHD mutation from his/her father is at high risk of manifesting paragangliomas and, to a lesser extent, pheochromocytomas. Prenatal testing for pregnancies at increased risk is possible for families in which the disease-causing mutation is known; if no laboratories offering prenatal testing are listed in the GeneTeststrade mark Laboratory Directory, such testing may be available through laboratories offering custom prenatal testing.
    References

    Pheochromocytoma

    Summary from GeneReviews: Hereditary Paraganglioma-Pheochromocytoma Syndromes Go to GeneReviews

    Disease Characteristics
    Hereditary paraganglioma-pheochromocytoma (PGL/PCC) syndromes are characterized by paragangliomas (tumors that arise from neuroendocrine tissues symmetrically distributed along the paravertebral axis from the base of the skull to the pelvis) and by pheochromocytomas (paragangliomas that are confined to the adrenal medulla). Sympathetic paragangliomas hypersecrete catecholamines; parasympathetic paragangliomas are most often nonsecretory. Extra-adrenal parasympathetic paragangliomas are located predominantly in the skull base, neck, and upper medistinum; approximately 95% of such tumors are nonsecretory. In contrast, sympathetic extra-adrenal paragangliomas are generally confined to the lower mediastinum, abdomen, and pelvis, and are typically secretory. Pheochromocytomas, which arise from the adrenal medulla, typically hypersecrete catecholamines. Symptoms of PGL/PCC result either from mass effects or catecholamine hypersecretion (e.g., sustained or paroxysmal elevations in blood pressure, headache, episodic profuse sweating, forceful palpitations, pallor, and apprehension or anxiety). The risk for malignant transformation is greater for extra-adrenal sympathetic paragangliomas than for pheochromocytomas or skull base and neck paragangliomas.
    Diagnosis Testing
    The diagnosis of hereditary PGL/PCC syndromes is based on physical examination, family history, imaging studies, biochemical testing, and molecular genetic testing. SDHA, SDHB, SDHC and SDHD are four nuclear genes that encode the four subunits of the mitochondrial enzyme succinate dehydrogenase (SDH). A fifth nuclear gene, SDHAF2 (also known as SDH5) encodes a protein that appears to be required for flavination of another SDH subunit, SDHA. These are collectively known as the SDHx genes. Mutations in MAX predispose to PCC; a subset of individuals with mutations in MAX will also develop PGL. KIF1B and EGLN1 (formerly known as PHD2) have been reported to be associated with hereditary PGL/PCC, but their clinical significance is still unclear. Molecular genetic testing for disease-causing variants in SDHA, SDHB, SDHC, SDHD, SDHAF2, and MAX is clinically available.
    Genetic Counseling
    The hereditary PGL/PCC syndromes are inherited in an autosomal dominant manner. Mutations in SDHD (PGL1) demonstrate parent-of-origin effects and generally cause disease only when the mutation is inherited from the father. Initial data suggest that mutations in SDHAF2 (PGL2) and MAX exhibit parent-of-origin effects similar to those of mutations in SDHD. A proband with a hereditary PGL/PCC syndrome may have inherited the mutation from a parent or have a de novo mutation; the proportion of cases caused by de novo mutations is unknown. Each child of an individual with a hereditary PGL/PCC syndrome has a 50% chance of inheriting the disease-causing mutation. An individual who inherits a SDHD mutation from his/her mother is at a low but not negligible risk of developing disease; each of his/her offspring is at a 50% risk of inheriting the disease-causing allele. An individual who inherits an SDHD mutation from his/her father is at high risk of manifesting paragangliomas and, to a lesser extent, pheochromocytomas. Prenatal testing for pregnancies at increased risk is possible for families in which the disease-causing mutation is known; if no laboratories offering prenatal testing are listed in the GeneTeststrade mark Laboratory Directory, such testing may be available through laboratories offering custom prenatal testing.
    References

    Markers

    Homology

    Gene Ontology Provided by GOA

    Function Evidence Code Pubs
    electron carrier activity TAS
    Traceable Author Statement
    more info
    PubMed 
    heme binding ISS
    Inferred from Sequence or Structural Similarity
    more info
     
    metal ion binding IEA
    Inferred from Electronic Annotation
    more info
     
    succinate dehydrogenase activity IDA
    Inferred from Direct Assay
    more info
    PubMed 
    ubiquinone binding ISS
    Inferred from Sequence or Structural Similarity
    more info
     
    Process Evidence Code Pubs
    respiratory electron transport chain TAS
    Traceable Author Statement
    more info
     
    small molecule metabolic process TAS
    Traceable Author Statement
    more info
     
    tricarboxylic acid cycle IDA
    Inferred from Direct Assay
    more info
    PubMed 
    tricarboxylic acid cycle IEA
    Inferred from Electronic Annotation
    more info
     
    tricarboxylic acid cycle TAS
    Traceable Author Statement
    more info
     
    Component Evidence Code Pubs
    integral to membrane IEA
    Inferred from Electronic Annotation
    more info
     
    mitochondrial envelope TAS
    Traceable Author Statement
    more info
    PubMed 
    mitochondrial inner membrane IDA
    Inferred from Direct Assay
    more info
    PubMed 
    mitochondrial inner membrane ISS
    Inferred from Sequence or Structural Similarity
    more info
     
    mitochondrial inner membrane TAS
    Traceable Author Statement
    more info
     
    mitochondrial respiratory chain complex II ISS
    Inferred from Sequence or Structural Similarity
    more info
     
    mitochondrion TAS
    Traceable Author Statement
    more info
    PubMed 
    Preferred Names
    succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
    Names
    succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
    succinate-ubiquinone reductase membrane anchor subunit
    succinate-ubiquinone oxidoreductase cytochrome b small subunit

    RefSeqs maintained independently of Annotated Genomes

    These reference sequences exist independently of genome builds. Explain

    These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

    Genomic

    1. NG_012337.2 RefSeqGene

      Range
      4978..13955
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_001276503.1NP_001263432.1  succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial isoform b precursor

      Status: REVIEWED

      Description
      Transcript Variant: This variant (2) lacks an alternate coding exon, which results in a frameshift, compared to variant 1. The encoded isoform (b) is shorter and has a distinct C-terminus, compared to isoform a.
      Source sequence(s)
      AI753083, AP002007, BC015188, BQ932668, CD105572
      UniProtKB/TrEMBL
      E9PQI9
    2. NM_001276504.1NP_001263433.1  succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial isoform c precursor

      Status: REVIEWED

      Description
      Transcript Variant: This variant (3) lacks an alternate coding exon, but retains the reading frame, compared to variant 1. The encoded isoform (c) is shorter than isoform a.
      Source sequence(s)
      AI753083, AP002007, BC015188, BF211358, BQ932668
      UniProtKB/TrEMBL
      E9PIC0
      Conserved Domains (1) summary
      cl00881
      Location:18119
      Blast Score: 225
      SQR_QFR_TM; 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, ...
    3. NM_001276506.1NP_001263435.1  succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial isoform d precursor

      Status: REVIEWED

      Description
      Transcript Variant: This variant (4) contains an alternate coding exon, which results in a frameshift, compared to variant 1. The encoded isoform (d) is shorter and has a distinct C-terminus, compared to isoform a.
      Source sequence(s)
      AI753083, AP002007, BC015188, BG492859, BQ932668
      UniProtKB/TrEMBL
      E9PIG3
      Conserved Domains (1) summary
      cl00881
      Location:57105
      Blast Score: 122
      SQR_QFR_TM; 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, ...
    4. NM_003002.3NP_002993.1  succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial isoform a precursor

      Status: REVIEWED

      Description
      Transcript Variant: This variant (1) encodes the longest isoform (a).
      Source sequence(s)
      AI753083, AP002007, BC015188, BQ932668
      Consensus CDS
      CCDS31678.1
      UniProtKB/Swiss-Prot
      O14521
      Related
      ENSP00000364699, OTTHUMP00000234720, ENST00000375549, OTTHUMT00000392351
      Conserved Domains (1) summary
      cd03496
      Location:60158
      Blast Score: 225
      SQR_TypeC_CybS; SQR catalyzes the oxidation of succinate to fumarate coupled to the reduction of quinone to quinol. Eukaryotic SQRs reduce high potential quinones such as ubiquinone. SQR is also called succinate dehydrogenase or Complex II, and is part of the citric ...

    RNA

    1. NR_077060.1 RNA Sequence

      Status: REVIEWED

      Description
      Transcript Variant: This variant (5) contains an alternate internal exon, compared to variant 1. This variant is represented as non-coding because the use of the translational start codon, as used in variant 1, renders the transcript a candidate for nonsense-mediated mRNA decay (NMD).
      Source sequence(s)
      AI753083, AP002007, BC015188, BE567994, BQ932668

    RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 104

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh37.p10 Primary Assembly

    Genomic

    1. NC_000011.9 Reference GRCh37.p10 Primary Assembly

      Range
      111957571..111966518
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Alternate HuRef

    Genomic

    1. AC_000143.1 Alternate HuRef

      Range
      107881603..107890550
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Alternate CHM1_1.0

    Genomic

    1. NC_018922.1 Alternate CHM1_1.0

      Range
      111821039..111829987
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

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