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Reviewed, UniProtKB/Swiss-Prot P51649 (SSDH_HUMAN)

Last modified February 9, 2010. Version 102. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (7) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Web resources · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Succinate-semialdehyde dehydrogenase, mitochondrial
    EC=1.2.1.24
Alternative name(s):
    NAD(+)-dependent succinic semialdehyde dehydrogenase
    Aldehyde dehydrogenase family 5 member A1
Gene names
Name: ALDH5A1
Synonyms: SSADH
OrganismHomo sapiens (Human) [Complete proteome]
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length535 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Catalyzes one step in the degradation of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA).

Catalytic activity

Succinate semialdehyde + NAD+ + H2O = succinate + NADH.

Enzyme regulation

Redox-regulated. Inhibited under oxydizing conditions. Inhibited by hydrogen peroxide H2O2.

Pathway

Amino-acid degradation; 4-aminobutanoate degradation.

Subunit structure

Homotetramer. Ref.6

Subcellular location

Mitochondrion.

Tissue specificity

Brain, pancreas, heart, liver, skeletal muscle and kidney. Lower in placenta.

Involvement in disease

Defects in ALDH5A1 are the cause of succinate semialdehyde dehydrogenase deficiency (SSADH deficiency) [MIM:271980]. SSADH deficiency is a rare inborn error in the metabolism of 4-aminobutyric acid (GABA) which leads to accumulation of 4-hydroxybutyric acid in physiologic fluids of patients. The disease is characterized by severe ataxia and by mildly retarded psychomotor development.

Sequence similarities

Belongs to the aldehyde dehydrogenase family.

Ontologies

Keywords
   Cellular componentMitochondrion
   Coding sequence diversityPolymorphism
   DiseaseDisease mutation
   DomainTransit peptide
   LigandNAD
   Molecular functionOxidoreductase
   PTMAcetylation
Disulfide bond
   Technical term3D-structure
Complete proteome
Gene Ontology (GO)
   Biological processacetate metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

central nervous system development Ref.1

Inferred from mutant phenotype. Source: UniProtKB

galactosylceramide metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

gamma-aminobutyric acid catabolic process Ref.1

Inferred from direct assay. Source: UniProtKB

glucose metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

glutamate metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

glutamine metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

glutathione metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

glycerophospholipid metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

neurotransmitter catabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

protein homotetramerization

Inferred from direct assay. Source: UniProtKB

respiratory electron transport chain

Inferred from sequence or structural similarity. Source: UniProtKB

short-chain fatty acid metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

succinate metabolic process

Inferred from sequence or structural similarity. Source: UniProtKB

   Cellular componentmitochondrion

Inferred from sequence or structural similarity. Source: UniProtKB

soluble fraction

Inferred from direct assay. Source: UniProtKB

   Molecular functionprotein homodimerization activity

Inferred by curator. Source: UniProtKB

succinate-semialdehyde dehydrogenase activity Ref.1 Ref.5

Inferred from direct assay. Source: UniProtKB

Complete GO annotation...

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Transit peptide1 – 4747Mitochondrion Potential
Chain48 – 535488Succinate-semialdehyde dehydrogenase, mitochondrial
PRO_0000007184

Regions

Nucleotide binding228 – 2314NAD
Nucleotide binding284 – 2896NAD

Sites

Active site3061Proton acceptor By similarity
Active site3401Nucleophile By similarity
Binding site2131NAD
Binding site2131Substrate
Binding site3341Substrate
Binding site4981Substrate
Site2051Transition state stabilizer By similarity

Amino acid modifications

Modified residue1261N6-acetyllysine Ref.8
Modified residue3581N6-acetyllysine Ref.8
Disulfide bond340 ↔ 342In inhibited form

Natural variations

Natural variant361G → R: dbSNP rs4646832. Ref.12
VAR_026227
Natural variant931C → F in SSADH deficiency; 3% of activity. Ref.12
VAR_026199
Natural variant1761G → R in SSADH deficiency; <1% of activity. Ref.12
VAR_026200
Natural variant1801H → Y 83% of activity. dbSNP rs2760118. Ref.12 Ref.2
VAR_016758
Natural variant1821P → L 48% of activity. dbSNP rs3765310. Ref.12
VAR_016759
Natural variant2231C → Y in SSADH deficiency; 5% of activity. Ref.12
VAR_026201
Natural variant2331T → M in SSADH deficiency; 4% of activity. Ref.12
VAR_026202
Natural variant2371A → S 65% of activity. Ref.12
VAR_026228
Natural variant2551N → S in SSADH deficiency; 17% of activity. Ref.12
VAR_026203
Natural variant2681G → E in SSADH deficiency; <1% of activity. Ref.12 Ref.10
VAR_026204
Natural variant3351N → K in SSADH deficiency; 1% of activity. Ref.12
VAR_026205
Natural variant3821P → L in SSADH deficiency; 2% of activity. Ref.12
VAR_026206
Natural variant3821P → Q in SSADH deficiency. Ref.12
VAR_026207
Natural variant4061V → I
VAR_026229
Natural variant4091G → D in SSADH deficiency; <1% of activity. Ref.12 Ref.10
VAR_026208
Natural variant4871V → E in SSADH deficiency. Ref.11
VAR_026209
Natural variant5331G → R in SSADH deficiency; <1% of activity. Ref.12
VAR_026210

Experimental info

Mutagenesis2131R → A: Reduces catalytic activity to less than 15% of wild-type.
Mutagenesis3341R → A: Reduces catalytic activity to less than 15% of wild-type.
Mutagenesis3421C → A: Loss of regulation by redox state.
Mutagenesis4981S → A: Reduces catalytic activity to less than 15% of wild-type.

Secondary structure

.................................................................... 535
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
P51649-1 [UniParc].

Last modified May 30, 2000. Version 2.
Checksum: C63A9431D3FA16C7

FASTA53557,215
        10         20         30         40         50         60 
MATCIWLRSC GARRLGSTFP GCRLRPRAGG LVPASGPAPG PAQLRCYAGR LAGLSAALLR 

        70         80         90        100        110        120 
TDSFVGGRWL PAAATFPVQD PASGAALGMV ADCGVREARA AVRAAYEAFC RWREVSAKER 

       130        140        150        160        170        180 
SSLLRKWYNL MIQNKDDLAR IITAESGKPL KEAHGEILYS AFFLEWFSEE ARRVYGDIIH 

       190        200        210        220        230        240 
TPAKDRRALV LKQPIGVAAV ITPWNFPSAM ITRKVGAALA AGCTVVVKPA EDTPFSALAL 

       250        260        270        280        290        300 
AELASQAGIP SGVYNVIPCS RKNAKEVGEA ICTDPLVSKI SFTGSTTTGK ILLHHAANSV 

       310        320        330        340        350        360 
KRVSMELGGL APFIVFDSAN VDQAVAGAMA SKFRNTGQTC VCSNQFLVQR GIHDAFVKAF 

       370        380        390        400        410        420 
AEAMKKNLRV GNGFEEGTTQ GPLINEKAVE KVEKQVNDAV SKGATVVTGG KRHQLGKNFF 

       430        440        450        460        470        480 
EPTLLCNVTQ DMLCTHEETF GPLAPVIKFD TEEEAIAIAN AADVGLAGYF YSQDPAQIWR 

       490        500        510        520        530 
VAEQLEVGMV GVNEGLISSV ECPFGGVKQS GLGREGSKYG IDEYLELKYV CYGGL 

« Hide

References

« Hide 'large scale' references
[1]"Two exon-skipping mutations as the molecular basis of succinic semialdehyde dehydrogenase deficiency (4-hydroxybutyric aciduria)."
Chambliss K.L., Hinson D.D., Trettel F., Malaspina P., Novelletto A., Jakobs C., Gibson K.M.
Am. J. Hum. Genet. 63:399-408(1998) [PubMed: 9683595] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA].
Tissue: Lymphocyte.
[2]"Complete sequencing and characterization of 21,243 full-length human cDNAs."
Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. expand/collapse author list , Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K., Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A., Sudo H., Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M., Takahashi M., Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y., Abe K., Kamihara K., Katsuta N., Sato K., Tanikawa M., Yamazaki M., Ninomiya K., Ishibashi T., Yamashita H., Murakawa K., Fujimori K., Tanai H., Kimata M., Watanabe M., Hiraoka S., Chiba Y., Ishida S., Ono Y., Takiguchi S., Watanabe S., Yosida M., Hotuta T., Kusano J., Kanehori K., Takahashi-Fujii A., Hara H., Tanase T.-O., Nomura Y., Togiya S., Komai F., Hara R., Takeuchi K., Arita M., Imose N., Musashino K., Yuuki H., Oshima A., Sasaki N., Aotsuka S., Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S., Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O., Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H., Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B., Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y., Fujimori Y., Komiyama M., Tashiro H., Tanigami A., Fujiwara T., Ono T., Yamada K., Fujii Y., Ozaki K., Hirao M., Ohmori Y., Kawabata A., Hikiji T., Kobatake N., Inagaki H., Ikema Y., Okamoto S., Okitani R., Kawakami T., Noguchi S., Itoh T., Shigeta K., Senba T., Matsumura K., Nakajima Y., Mizuno T., Morinaga M., Sasaki M., Togashi T., Oyama M., Hata H., Watanabe M., Komatsu T., Mizushima-Sugano J., Satoh T., Shirai Y., Takahashi Y., Nakagawa K., Okumura K., Nagase T., Nomura N., Kikuchi H., Masuho Y., Yamashita R., Nakai K., Yada T., Nakamura Y., Ohara O., Isogai T., Sugano S.
Nat. Genet. 36:40-45(2004) [PubMed: 14702039] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA], VARIANT TYR-180.
Tissue: Brain.
[3]"The DNA sequence and analysis of human chromosome 6."
Mungall A.J., Palmer S.A., Sims S.K., Edwards C.A., Ashurst J.L., Wilming L., Jones M.C., Horton R., Hunt S.E., Scott C.E., Gilbert J.G.R., Clamp M.E., Bethel G., Milne S., Ainscough R., Almeida J.P., Ambrose K.D., Andrews T.D. expand/collapse author list , Ashwell R.I.S., Babbage A.K., Bagguley C.L., Bailey J., Banerjee R., Barker D.J., Barlow K.F., Bates K., Beare D.M., Beasley H., Beasley O., Bird C.P., Blakey S.E., Bray-Allen S., Brook J., Brown A.J., Brown J.Y., Burford D.C., Burrill W., Burton J., Carder C., Carter N.P., Chapman J.C., Clark S.Y., Clark G., Clee C.M., Clegg S., Cobley V., Collier R.E., Collins J.E., Colman L.K., Corby N.R., Coville G.J., Culley K.M., Dhami P., Davies J., Dunn M., Earthrowl M.E., Ellington A.E., Evans K.A., Faulkner L., Francis M.D., Frankish A., Frankland J., French L., Garner P., Garnett J., Ghori M.J., Gilby L.M., Gillson C.J., Glithero R.J., Grafham D.V., Grant M., Gribble S., Griffiths C., Griffiths M.N.D., Hall R., Halls K.S., Hammond S., Harley J.L., Hart E.A., Heath P.D., Heathcott R., Holmes S.J., Howden P.J., Howe K.L., Howell G.R., Huckle E., Humphray S.J., Humphries M.D., Hunt A.R., Johnson C.M., Joy A.A., Kay M., Keenan S.J., Kimberley A.M., King A., Laird G.K., Langford C., Lawlor S., Leongamornlert D.A., Leversha M., Lloyd C.R., Lloyd D.M., Loveland J.E., Lovell J., Martin S., Mashreghi-Mohammadi M., Maslen G.L., Matthews L., McCann O.T., McLaren S.J., McLay K., McMurray A., Moore M.J.F., Mullikin J.C., Niblett D., Nickerson T., Novik K.L., Oliver K., Overton-Larty E.K., Parker A., Patel R., Pearce A.V., Peck A.I., Phillimore B.J.C.T., Phillips S., Plumb R.W., Porter K.M., Ramsey Y., Ranby S.A., Rice C.M., Ross M.T., Searle S.M., Sehra H.K., Sheridan E., Skuce C.D., Smith S., Smith M., Spraggon L., Squares S.L., Steward C.A., Sycamore N., Tamlyn-Hall G., Tester J., Theaker A.J., Thomas D.W., Thorpe A., Tracey A., Tromans A., Tubby B., Wall M., Wallis J.M., West A.P., White S.S., Whitehead S.L., Whittaker H., Wild A., Willey D.J., Wilmer T.E., Wood J.M., Wray P.W., Wyatt J.C., Young L., Younger R.M., Bentley D.R., Coulson A., Durbin R.M., Hubbard T., Sulston J.E., Dunham I., Rogers J., Beck S.
Nature 425:805-811(2003) [PubMed: 14574404] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[4]"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
The MGC Project Team
Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Tissue: Testis.
[5]"Molecular cloning of the mature NAD(+)-dependent succinic semialdehyde dehydrogenase from rat and human. cDNA isolation, evolutionary homology, and tissue expression."
Chambliss K.L., Caudle D.L., Hinson D.D., Moomaw C.R., Slaughter C.A., Jakobs C., Gibson K.M.
J. Biol. Chem. 270:461-467(1995) [PubMed: 7814412] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 213-535.
Tissue: Liver.
[6]"Human succinic semialdehyde dehydrogenase. Molecular cloning and chromosomal localization."
Trettel F., Malaspina P., Jodice C., Novelletto A., Slaughter C.A., Caudle D.L., Hinson D.D., Chambliss K.L., Gibson K.M.
Adv. Exp. Med. Biol. 414:253-260(1997) [PubMed: 9059628] [Abstract]
Cited for: SUBUNIT.
Tissue: Brain.
[7]Colinge J., Superti-Furga G., Bennett K.L.
Submitted (OCT-2008) to UniProtKB
Cited for: IDENTIFICATION [LARGE SCALE ANALYSIS], MASS SPECTROMETRY.
[8]"Lysine acetylation targets protein complexes and co-regulates major cellular functions."
Choudhary C., Kumar C., Gnad F., Nielsen M.L., Rehman M., Walther T., Olsen J.V., Mann M.
Science 325:834-840(2009) [PubMed: 19608861] [Abstract]
Cited for: ACETYLATION [LARGE SCALE ANALYSIS] AT LYS-126 AND LYS-358, MASS SPECTROMETRY.
[9]"Redox-switch modulation of human SSADH by dynamic catalytic loop."
Kim Y.-G., Lee S., Kwon O.-S., Park S.-Y., Lee S.-J., Park B.-J., Kim K.-J.
EMBO J. 28:959-968(2009) [PubMed: 19300440] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (2.0 ANGSTROMS) OF 49-535, IN COMPLEX WITH PRODUCT AND ADP, FUNCTION, ENZYME REGULATION, DISULFIDE BOND, MUTAGENESIS OF ARG-213; ARG-334; CYS-342 AND SER-498.
[10]"Prenatal diagnosis of succinic semialdehyde dehydrogenase deficiency: increased accuracy employing DNA, enzyme, and metabolite analyses."
Hogema B.M., Akaboshi S., Taylor M., Salomons G.S., Jakobs C., Schutgens R.B., Wilcken B., Worthington S., Maropoulos G., Grompe M., Gibson K.M.
Mol. Genet. Metab. 72:218-222(2001) [PubMed: 11243727] [Abstract]
Cited for: VARIANTS SSADH DEFICIENCY GLU-268 AND ASP-409.
[11]"Mutation analysis in a patient with succinic semialdehyde dehydrogenase deficiency: a compound heterozygote with 103-121del and 1460T>A of the ALDH5A1 gene."
Aoshima T., Kajita M., Sekido Y., Ishiguro Y., Tsuge I., Kimura M., Yamaguchi S., Watanabe K., Shimokata K., Niwa T.
Hum. Hered. 53:42-44(2002) [PubMed: 11901270] [Abstract]
Cited for: VARIANT SSADH DEFICIENCY GLU-487.
[12]"Mutational spectrum of the succinate semialdehyde dehydrogenase (ALDH5A1) gene and functional analysis of 27 novel disease-causing mutations in patients with SSADH deficiency."
Akaboshi S., Hogema B.M., Novelletto A., Malaspina P., Salomons G.S., Maropoulos G.D., Jakobs C., Grompe M., Gibson K.M.
Hum. Mutat. 22:442-450(2003) [PubMed: 14635103] [Abstract]
Cited for: VARIANTS SSADH DEFICIENCY PHE-93; ARG-176; TYR-223; MET-233; SER-255; GLU-268; LYS-335; GLN-382; LEU-382; ASP-409 AND ARG-533, VARIANTS ARG-36; TYR-180; LEU-182; SER-237 AND ILE-406, CHARACTERIZATION OF VARIANTS ARG-36; PHE-93; ARG-176; TYR-180; LEU-182; TYR-223; MET-233; SER-237; SER-255; GLU-268; LYS-335; LEU-382; ASP-409 AND ARG-533.
+Additional computationally mapped references.

Web resources

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
Y11192 mRNA. Translation: CAA72076.1.
AK315380 mRNA. Translation: BAG37773.1.
AL031230 Genomic DNA. Translation: CAA20248.1.
BC034321 mRNA. Translation: AAH34321.1.
L34820 mRNA. Translation: AAA67057.1.
IPIIPI00019888.
PIRA55773.
RefSeqNP_001071.1.
NP_733936.1.
UniGeneHs.371723

3D structure databases

PDBe
RCSB PDB
PDBj
EntryMethodResolution (Å)ChainPositionsPDBsum
2W8NX-ray2.00A49-535[»]
2W8OX-ray3.40A49-535[»]
2W8PX-ray2.30A49-535[»]
2W8QX-ray2.40A49-535[»]
2W8RX-ray2.40A49-535[»]
ModBaseSearch...

Protein-protein interaction databases

STRINGP51649.

PTM databases

PhosphoSiteP51649.

Proteomic databases

PRIDEP51649.

Genome annotation databases

EnsemblENST00000357578; ENSP00000350191; ENSG00000112294; Homo sapiens. [Genome view]
GeneID7915.
KEGGhsa:7915.
UCSCuc003neg.1. human.

Organism-specific databases

CTD7915.
GeneCardsGC06P024603.
H-InvDBHIX0005623.
HGNCHGNC:408. ALDH5A1.
MIM271980. phenotype.
610045. gene.
Orphanet22. 4-hydroxybutyricaciduria.
PharmGKBPA24702.
GenAtlasSearch...

Phylogenomic databases

eggNOGprNOG06436.
HOVERGENP51649.
PhylomeDBP51649.

Enzyme and pathway databases

BioCycMetaCyc:MONOMER-11540.
BRENDA1.2.1.24. 247.

Gene expression databases

ArrayExpressP51649.
BgeeP51649.
CleanExHS_ALDH5A1.
GenevestigatorP51649.
GermOnlineENSG00000112294. Homo sapiens.

Family and domain databases

InterProIPR016161. Ald_DH/histidinol_DH.
IPR016160. Ald_DH_CS.
IPR016162. Ald_DH_N.
IPR015590. Aldehyde_DH.
IPR010102. Succ_semiAld_DH.
[Graphical view]
Gene3DG3DSA:3.40.605.10. Aldehyde_dehydrogenase_N. 1 hit.
PANTHERPTHR11699. Aldehyde_dehyd. 1 hit.
PfamPF00171. Aldedh. 1 hit.
[Graphical view]
TIGRFAMsTIGR01780. SSADH. 1 hit.
PROSITEPS00070. ALDEHYDE_DEHYDR_CYS. 1 hit.
PS00687. ALDEHYDE_DEHYDR_GLU. 1 hit.
[Graphical view]
ProtoNetSearch...

Other Resources

DrugBankDB00534. Chlormerodrin.
DB00157. NADH.
DB00139. Succinic acid.
NextBio30381.
SOURCESearch...

Entry information

Entry nameSSDH_HUMAN
AccessionPrimary (citable) accession number: P51649
Secondary accession number(s): B2RD26
Entry history
Integrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: May 30, 2000
Last modified: February 9, 2010
This is version 102 of the entry and version 2 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation projectHPI (Human Proteome Initiative)
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

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Human chromosome 6: entries, gene names and cross-references to MIM

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List of human entries with polymorphisms or disease mutations

Human polymorphisms and disease mutations

Index of human polymorphisms and disease mutations

MIM cross-references

Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot

PATHWAY comments

Index of metabolic and biosynthesis pathways

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families

Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Web resources · Cross-references · Entry information · Relevant documents