Summary: Acetyltransferase (GNAT) domain
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Acetyltransferase Edit Wikipedia article
- Histone acetyltransferases including CBP histone acetyltransferase
- Choline acetyltransferase
- Chloramphenicol acetyltransferase
- Serotonin N-acetyltransferase
- NatA Acetyltransferase
- NatB acetyltransferase
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Acetyltransferase (GNAT) domain Provide feedback
This domain catalyses N-acetyltransferase reactions.
Internal database links
|Similarity to PfamA using HHSearch:||Acetyltransf_1 Gly_acyl_tr_C FR47 GNAT_acetyltran Acetyltransf_4 Acetyltransf_7 Acetyltransf_8 Acetyltransf_9 Acetyltransf_10|
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR000182
The N-acetyltransferases (NAT) (EC 2.3.1.-) are enzymes that use acetyl coenzyme A (CoA) to transfer an acetyl group to a substrate, a reaction implicated in various functions from bacterial antibiotic resistance to mammalian circadian rhythm and chromatin remodeling. The Gcn5-related N-acetyltransferases (GNAT) catalyze the transfer of the acetyl from the CoA donor to a primary amine of the acceptor. The GNAT proteins share a domain composed of four conserved sequence motifs A-D [PUBMED:9175471, PUBMED:10940244]. This GNAT domain is named after yeast GCN5 (from General Control Nonrepressed) and related histone acetyltransferases (HATs) like Hat1 and PCAF. HATs acetylate lysine residues of amino terminal histone tails, resulting in transcription activation. Another category of GNAT, the aminoglycoside N-acetyltransferases, confer antibiotic resistance by catalyzing the acetylation of amino groups in aminoglycoside antibiotics [PUBMED:12592013]. GNAT proteins can also have anabolic and catabolic functions in both prokaryotes and eukaryotes [PUBMED:9175471, PUBMED:10940244, PUBMED:12592013, PUBMED:12527305, PUBMED:15581578].
The acetyltransferase/GNAT domain forms a structurally conserved fold of 6 to 7 beta strands (B) and 4 helices (H) in the topology B1-H1-H2-B2-B3-B4-H3-B5-H4-B6, followed by a C-terminal strand which may be from the same monomer or contributed by another [PUBMED:10940244, PUBMED:15581578]. Motifs D (B2-B3), A (B4-H3) and B (B5-H4) are collectively called the HAT core [PUBMED:10940244, PUBMED:12527305, PUBMED:15581578], while the N-terminal motif C (B1-H1) is less conserved.
Some proteins known to contain a GNAT domain:
- Yeast GCN5 and Hat1, which are histone acetyltransferases (EC 184.108.40.206).
- Human PCAF, a histone acetyltransferase.
- Mammalian serotonin N-acetyltransferase (SNAT) or arylalkylamine NAT (AANAT), which acetylates serotonin into a circadian neurohormone that may participate in light-dark rhythms, and human mood and behavior.
- Mammalian glucosamine 6-phosphate N-acetyltransferase (GNA1) (EC 220.127.116.11).
- Escherichia coli rimI and rimJ, which acetylate the N-terminal alanine of ribosomal proteins S18 and S5, respectively (EC 18.104.22.168).
- Mycobacterium tuberculosis aminoglycoside 2'-N-acetyltransferase (aac), which acetylates the 2' hydroxyl or amino group of a broad spectrum of aminoglycoside antibiotics.
- Bacillus subtilis bltD and paiA, which acetylate spermine and spermidine.
This entry represents the entire GNAT domain.
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Molecular function||N-acetyltransferase activity (GO:0008080)|
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This clan contains families related to N-acetyltransferases. N-acetyltransferases catalyse the transfer of acetyl groups from acetyl-CoA to arylamines.
The clan contains the following 31 members:Acetyltransf_1 Acetyltransf_10 Acetyltransf_13 Acetyltransf_3 Acetyltransf_4 Acetyltransf_5 Acetyltransf_6 Acetyltransf_7 Acetyltransf_8 Acetyltransf_9 Acetyltransf_CG ATE_C ATE_N Autoind_synth DUF1248 DUF1999 DUF2156 DUF3749 DUF482 DUF619 FemAB FR47 Gly_acyl_tr_C GNAT_acetyltr_2 GNAT_acetyltran Leu_Phe_trans Mec-17 Mig-14 MOZ_SAS NMT NodA
We make a range of alignments for each Pfam-A family:
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Curation and family details
|Number in seed:||406|
|Number in full:||20736|
|Average length of the domain:||139.30 aa|
|Average identity of full alignment:||19 %|
|Average coverage of the sequence by the domain:||68.41 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||1|
|Download:||download the raw HMM for this family|
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For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the Acetyltransf_3 domain has been found. There are 65 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein seqence.
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