Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Entry version 153 (25 May 2022)
Sequence version 2 (15 Dec 1998)
Previous versions | rss
Add a publicationFeedback
Protein

Succinate semialdehyde dehydrogenase [NAD(P)+] Sad

Gene

sad

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Catalyzes the NAD+-dependent oxidation of succinate semialdehyde to succinate. It acts preferentially with NAD as cosubstrate but can also use NADP. Prevents the toxic accumulation of succinate semialdehyde (SSA) and plays an important role when arginine and putrescine are used as the sole nitrogen or carbon sources.

4 Publications

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

The enzyme reduced NADP at 15 % of the rate of NAD reduction.
  1. KM=13.3 µM for succinate semialdehyde (with 0.6 mM NAD, at pH 8 and at 30 degrees Celsius)1 Publication
  2. KM=33.7 µM for succinate semialdehyde (with 0.1 mM NAD, at pH 8 and at 30 degrees Celsius)1 Publication

pH dependencei

Optimum pH is 8.2. Activity decreases sharply as the pH is raised above pH 9.2.1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: 4-aminobutanoate degradation

This protein is involved in the pathway 4-aminobutanoate degradation, which is part of Amino-acid degradation.
View all proteins of this organism that are known to be involved in the pathway 4-aminobutanoate degradation and in Amino-acid degradation.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei234Proton acceptorPROSITE-ProRule annotation1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei235NADP; via carbonyl oxygenBy similarity1
Active sitei268NucleophilePROSITE-ProRule annotation1
Binding sitei365NADPBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi136 – 137NADPBy similarity2
Nucleotide bindingi160 – 163NADPBy similarity4
Nucleotide bindingi212 – 213NADPBy similarity2

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

  • arginine catabolic process Source: EcoCyc
  • gamma-aminobutyric acid catabolic process Source: EcoliWiki
  • nitrogen compound metabolic process Source: UniProtKB
  • putrescine catabolic process Source: EcoCyc

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionOxidoreductase
LigandNADP

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:G6811-MONOMER

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00733

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Succinate semialdehyde dehydrogenase [NAD(P)+] Sad (EC:1.2.1.16)
Short name:
SSADH
Short name:
SSDH
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:sad
Synonyms:yneI
Ordered Locus Names:b1525, JW5247
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiEscherichia coli (strain K12)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri83333 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000318 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Cells are unable to grow on 4-hydroxyphenylacetate.1 Publication

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00000565981 – 462Succinate semialdehyde dehydrogenase [NAD(P)+] SadAdd BLAST462

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
P76149

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
P76149

PRoteomics IDEntifications database

More...
PRIDEi
P76149

2D gel databases

Two-dimensional polyacrylamide gel electrophoresis database from the Geneva University Hospital

More...
SWISS-2DPAGEi
P76149

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

By p-hydroxyphenylacetate, succinate semialdehyde (SSA) and putrescine. Highly expressed under several stress conditions together with many genes related to the metabolism of nitrogen compounds.2 Publications

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer.

1 Publication

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
4261693, 15 interactors

Database of interacting proteins

More...
DIPi
DIP-12758N

Protein interaction database and analysis system

More...
IntActi
P76149, 1 interactor

STRING: functional protein association networks

More...
STRINGi
511145.b1525

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

AlphaFold Protein Structure Database

More...
AlphaFoldDBi
P76149

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
P76149

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the aldehyde dehydrogenase family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG1012, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_005391_1_0_6

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P76149

Identification of Orthologs from Complete Genome Data

More...
OMAi
KAMRWYA

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P76149

Family and domain databases

Conserved Domains Database

More...
CDDi
cd07100, ALDH_SSADH1_GabD1, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.40.309.10, 1 hit
3.40.605.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR016161, Ald_DH/histidinol_DH
IPR016163, Ald_DH_C
IPR016160, Ald_DH_CS_CYS
IPR016162, Ald_DH_N
IPR015590, Aldehyde_DH_dom
IPR044148, ALDH_GabD1-like

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00171, Aldedh, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF53720, SSF53720, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00070, ALDEHYDE_DEHYDR_CYS, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

P76149-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MTITPATHAI SINPATGEQL SVLPWAGADD IENALQLAAA GFRDWRETNI
60 70 80 90 100
DYRAEKLRDI GKALRARSEE MAQMITREMG KPINQARAEV AKSANLCDWY
110 120 130 140 150
AEHGPAMLKA EPTLVENQQA VIEYRPLGTI LAIMPWNFPL WQVMRGAVPI
160 170 180 190 200
ILAGNGYLLK HAPNVMGCAQ LIAQVFKDAG IPQGVYGWLN ADNDGVSQMI
210 220 230 240 250
KDSRIAAVTV TGSVRAGAAI GAQAGAALKK CVLELGGSDP FIVLNDADLE
260 270 280 290 300
LAVKAAVAGR YQNTGQVCAA AKRFIIEEGI ASAFTERFVA AAAALKMGDP
310 320 330 340 350
RDEENALGPM ARFDLRDELH HQVEKTLAQG ARLLLGGEKM AGAGNYYPPT
360 370 380 390 400
VLANVTPEMT AFREEMFGPV AAITIAKDAE HALELANDSE FGLSATIFTT
410 420 430 440 450
DETQARQMAA RLECGGVFIN GYCASDARVA FGGVKKSGFG RELSHFGLHE
460
FCNIQTVWKD RI
Length:462
Mass (Da):49,718
Last modified:December 15, 1998 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i78BEF85ED538C684
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
U00096 Genomic DNA Translation: AAC74598.2
AP009048 Genomic DNA Translation: BAA15208.2

Protein sequence database of the Protein Information Resource

More...
PIRi
H64906

NCBI Reference Sequences

More...
RefSeqi
NP_416042.2, NC_000913.3
WP_000156615.1, NZ_SSZK01000001.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC74598; AAC74598; b1525
BAA15208; BAA15208; BAA15208

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
947440

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW5247
eco:b1525

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|1411691.4.peg.741

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U00096 Genomic DNA Translation: AAC74598.2
AP009048 Genomic DNA Translation: BAA15208.2
PIRiH64906
RefSeqiNP_416042.2, NC_000913.3
WP_000156615.1, NZ_SSZK01000001.1

3D structure databases

AlphaFoldDBiP76149
SMRiP76149
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi4261693, 15 interactors
DIPiDIP-12758N
IntActiP76149, 1 interactor
STRINGi511145.b1525

2D gel databases

SWISS-2DPAGEiP76149

Proteomic databases

jPOSTiP76149
PaxDbiP76149
PRIDEiP76149

Genome annotation databases

EnsemblBacteriaiAAC74598; AAC74598; b1525
BAA15208; BAA15208; BAA15208
GeneIDi947440
KEGGiecj:JW5247
eco:b1525
PATRICifig|1411691.4.peg.741

Organism-specific databases

EchoBASE - an integrated post-genomic database for E. coli

More...
EchoBASEi
EB3578

Phylogenomic databases

eggNOGiCOG1012, Bacteria
HOGENOMiCLU_005391_1_0_6
InParanoidiP76149
OMAiKAMRWYA
PhylomeDBiP76149

Enzyme and pathway databases

UniPathwayiUPA00733
BioCyciEcoCyc:G6811-MONOMER

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P76149

Family and domain databases

CDDicd07100, ALDH_SSADH1_GabD1, 1 hit
Gene3Di3.40.309.10, 1 hit
3.40.605.10, 1 hit
InterProiView protein in InterPro
IPR016161, Ald_DH/histidinol_DH
IPR016163, Ald_DH_C
IPR016160, Ald_DH_CS_CYS
IPR016162, Ald_DH_N
IPR015590, Aldehyde_DH_dom
IPR044148, ALDH_GabD1-like
PfamiView protein in Pfam
PF00171, Aldedh, 1 hit
SUPFAMiSSF53720, SSF53720, 1 hit
PROSITEiView protein in PROSITE
PS00070, ALDEHYDE_DEHYDR_CYS, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiSAD_ECOLI
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P76149
Secondary accession number(s): P78220, P78286
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: December 15, 1998
Last modified: May 25, 2022
This is version 153 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again