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127  structures 5404  species 2  interactions 41592  sequences 3219  architectures

Family: PP-binding (PF00550)

Summary: Phosphopantetheine attachment site

Pfam includes annotations and additional family information from a range of different sources. These sources can be accessed via the tabs below.

The Pfam group coordinates the annotation of Pfam families in Wikipedia, but we have not yet assigned a Wikipedia article to this family. If you think that a particular Wikipedia article provides good annotation, please let us know.

This tab holds the annotation information that is stored in the Pfam database. As we move to using Wikipedia as our main source of annotation, the contents of this tab will be gradually replaced by the Wikipedia tab.

Phosphopantetheine attachment site Provide feedback

A 4'-phosphopantetheine prosthetic group is attached through a serine. This prosthetic group acts as a a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups. This domain forms a four helix bundle. This family includes members not included in Prosite. The inclusion of these members is supported by sequence analysis and functional evidence. The related domain of P19828 has the attachment serine replaced by an alanine.

External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR009081

Acyl carrier protein (ACP) is an essential cofactor in the synthesis of fatty acids by the fatty acid synthetases systems in bacteria and plants. In addition to fatty acid synthesis, ACP is also involved in many other reactions that require acyl transfer steps, such as the synthesis of polyketide antibiotics, biotin precursor, membrane-derived oligosaccharides, and activation of toxins, and functions as an essential cofactor in lipoylation of pyruvate and alpha-ketoglutarate dehydrogenase complexes [PUBMED:12057197]. Phosphopantetheine (or pantetheine 4' phosphate) is the prosthetic group of acyl carrier proteins (ACP) in some multienzyme complexes where it serves as a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups [PUBMED:18551496]. Phosphopantetheine is attached to a serine residue in these proteins. The core structure of ACP consists of a four-helical bundle, where helix three is shorter than the others.

Several other proteins share structural homology with ACP, such as the bacterial apo-D-alanyl carrier protein, which facilitates the incorporation of D-alanine into lipoteichoic acid by a ligase, necessary for the growth and development of Gram-positive organisms [PUBMED:11434765]; and the thioester domain of the bacterial peptide carrier protein (PCP) found within large modular non-ribosomal peptide synthetases, which are responsible for the synthesis of a variety of microbial bioactive peptides [PUBMED:10801488].

Domain organisation

Below is a listing of the unique domain organisations or architectures in which this domain is found. More...

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Pfam Clan

This family is a member of clan PP-binding (CL0314), which contains the following 4 members:

DUF1493 PP-binding PP-binding_2 Ribosomal_L50

Alignments

We store a range of different sequence alignments for families. As well as the seed alignment from which the family is built, we provide the full alignment, generated by searching the sequence database using the family HMM. We also generate alignments using four representative proteomes (RP) sets, the NCBI sequence database, and our metagenomics sequence database. More...

View options

We make a range of alignments for each Pfam-A family. You can see a description of each above. You can view these alignments in various ways but please note that some types of alignment are never generated while others may not be available for all families, most commonly because the alignments are too large to handle.

  Seed
(163)
Full
(41592)
Representative proteomes NCBI
(37590)
Meta
(2935)
RP15
(3350)
RP35
(7619)
RP55
(11106)
RP75
(13580)
Jalview View  View  View  View  View  View  View  View 
HTML View    View           
PP/heatmap 1   View           
Pfam viewer View  View             

1Cannot generate PP/Heatmap alignments for seeds; no PP data available

Key: ✓ available, x not generated, not available.

Format an alignment

  Seed
(163)
Full
(41592)
Representative proteomes NCBI
(37590)
Meta
(2935)
RP15
(3350)
RP35
(7619)
RP55
(11106)
RP75
(13580)
Alignment:
Format:
Order:
Sequence:
Gaps:
Download/view:

Download options

We make all of our alignments available in Stockholm format. You can download them here as raw, plain text files or as gzip-compressed files.

  Seed
(163)
Full
(41592)
Representative proteomes NCBI
(37590)
Meta
(2935)
RP15
(3350)
RP35
(7619)
RP55
(11106)
RP75
(13580)
Raw Stockholm Download   Download   Download   Download   Download   Download   Download   Download  
Gzipped Download   Download   Download   Download   Download   Download   Download   Download  

You can also download a FASTA format file containing the full-length sequences for all sequences in the full alignment.

External links

MyHits provides a collection of tools to handle multiple sequence alignments. For example, one can refine a seed alignment (sequence addition or removal, re-alignment or manual edition) and then search databases for remote homologs using HMMER3.

Pfam alignments:

HMM logo

HMM logos is one way of visualising profile HMMs. Logos provide a quick overview of the properties of an HMM in a graphical form. You can see a more detailed description of HMM logos and find out how you can interpret them here. More...

Trees

This page displays the phylogenetic tree for this family's seed alignment. We use FastTree to calculate neighbour join trees with a local bootstrap based on 100 resamples (shown next to the tree nodes). FastTree calculates approximately-maximum-likelihood phylogenetic trees from our seed alignment.

Note: You can also download the data file for the tree.

Curation and family details

This section shows the detailed information about the Pfam family. You can see the definitions of many of the terms in this section in the glossary and a fuller explanation of the scoring system that we use in the scores section of the help pages.

Curation View help on the curation process

Seed source: SCOP
Previous IDs: pp-binding;
Type: Domain
Author: Bateman A
Number in seed: 163
Number in full: 41592
Average length of the domain: 66.40 aa
Average identity of full alignment: 23 %
Average coverage of the sequence by the domain: 7.49 %

HMM information View help on HMM parameters

HMM build commands:
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
Model details:
Parameter Sequence Domain
Gathering cut-off 20.8 20.8
Trusted cut-off 20.8 20.8
Noise cut-off 20.7 20.7
Model length: 67
Family (HMM) version: 20
Download: download the raw HMM for this family

Species distribution

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This visualisation provides a simple graphical representation of the distribution of this family across species. You can find the original interactive tree in the adjacent tab. More...

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Tree controls

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Interactions

There are 2 interactions for this family. More...

PP-binding Condensation

Structures

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 PP-binding domain has been found. There are 127 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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