Summary: TNF(Tumour Necrosis Factor) family
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Tumor necrosis factors Edit Wikipedia article
|TNF (Tumor Necrosis Factor) family|
crystal structure of trail-sdr5
- Tumor necrosis factor (TNF), formerly known as TNFα or TNF alpha, is the best-known member of this class. TNF is a monocyte-derived cytotoxin that has been implicated in tumor regression, septic shock, and cachexia. The protein is synthesized as a prohormone with an unusually long and atypical signal sequence, which is absent from the mature secreted cytokine. A short hydrophobic stretch of amino acids serves to anchor the prohormone in lipid bilayers. Both the mature protein and a partially processed form of the hormone can be secreted after cleavage of the propeptide.
- Lymphotoxin-alpha, formerly known as Tumor necrosis factor-beta (TNF-β), is a cytokine that is inhibited by interleukin 10.
- Tumor Necrosis Factor (TNF) (also known as cachectin  or TNF alpha) is a cytokine that has a wide variety of functions. It can cause cytolysis of certain tumor cell lines; it is involved in the induction of cachexia; it is a potent pyrogen, causing fever by direct action or by stimulation of interleukin-1 secretion; it can stimulate cell proliferation and induce cell differentiation under certain conditions.
- Lymphotoxin-alpha (LT-alpha) and lymphotoxin-beta (LT-beta), two related cytokines produced by lymphocytes that are cytotoxic for a wide range of tumor cells in vitro and in vivo.
- T cell antigen gp39 (CD40L), a cytokine that seems to be important in B-cell development and activation.
- CD27L, a cytokine that plays a role in T-cell activation. It induces the proliferation of co-stimulated T cells and enhances the generation of cytolytic T cells.
- CD30L, a cytokine that induces proliferation of T cells.
- FASL, a cytokine involved in cell death.
- 4-1BBL, an inducible T cell surface molecule that contributes to T-cell stimulation.
- OX40L, a cytokine that co-stimulates T cell proliferation and cytokine production.
- TNF-related apoptosis inducing ligand (TRAIL), a cytokine that induces apoptosis.
All these cytokines seem to form homotrimeric (or heterotrimeric in the case of LT-alpha/beta) complexes that are recognized by their specific receptors. Strong hydrogen bonds between the monomers stabilize the tertiary structure. One such example is the Asn34-Arg82 hydrogen bond in the M. musculus TNF alpha. The PROSITE pattern for this family is located in a beta-strand in the central section of the protein that is conserved across all members.
All members of the TNF family, with the exception of the secreted lymphotoxin and a proliferation-inducing ligand (APRIL), are type II transmembrane proteins that protrude from immune cells. Such membrane-bound TNF ligands frequently signal back to the immune cells when they contact and bind their cognate receptors on other cells.
Cytokines can be grouped into a family on the basis of sequence, functional and structural similarities. Tumor necrosis factor (TNF) (also known as TNF alpha or cachectin) is a monocyte-derived cytotoxin that has been implicated in tumour regression, septic shock and cachexia. The protein is synthesised as a prohormone with an unusually long and atypical signal sequence, which is absent from the mature secreted cytokine. A short hydrophobic stretch of amino acids serves to anchor the prohormone in lipid bilayers. Both the mature protein and a partially processed form of the hormone are secreted after cleavage of the propeptide.
Human proteins containing this domain include:
- CD40LG (TNFSF5); CD70 (TNFSF7); EDA; FASLG (TNFSF6); LTA (TNFSF1); LTB (TNFSF3);
- TNFSF4 (OX40L); TNFSF8 (CD153); TNFSF9; TNFSF10 (TRAIL); TNFSF11 (RANKL); TNFSF12 (TWEAK); TNFSF13; TNFSF13B; TNFSF14; TNFSF15; TNFSF18;
Notes and references
- Baeyens KJ, De Bondt HL, Raeymaekers A, Fiers W, De Ranter CJ (April 1999). "The structure of mouse tumour-necrosis factor at 1.4 Å resolution: towards modulation of its selectivity and trimerization". Acta Crystallogr. D Biol. Crystallogr. 55 (Pt 4): 772–8. doi:10.1107/s0907444998018435. PMID 10089307.
- Fransen L, Müller R, Marmenout A, Tavernier J, Van der Heyden J, Kawashima E, Chollet A, Tizard R, Van Heuverswyn H, Van Vliet A (June 1985). "Molecular cloning of mouse tumour necrosis factor cDNA and its eukaryotic expression". Nucleic Acids Res. 13 (12): 4417–29. doi:10.1093/nar/13.12.4417. PMC 321797. PMID 2989794.
- Kriegler M, Perez C, DeFay K, Albert I, Lu SD (April 1988). "A novel form of TNF/cachectin is a cell surface cytotoxic transmembrane protein: ramifications for the complex physiology of TNF". Cell 53 (1): 45–53. doi:10.1016/0092-8674(88)90486-2. PMID 3349526.
- Sherry B, Jue DM, Zentella A, Cerami A (December 1990). "Characterization of high molecular weight glycosylated forms of murine tumor necrosis factor". Biochem. Biophys. Res. Commun. 173 (3): 1072–8. doi:10.1016/S0006-291X(05)80895-2. PMID 2268312.
- Cseh K, Beutler B (September 1989). "Alternative cleavage of the cachectin/tumor necrosis factor propeptide results in a larger, inactive form of secreted protein". J. Biol. Chem. 264 (27): 16256–60. PMID 2777790.
- Waltenbaugh C, Doan T, Melvold R, Viselli S (2008). Immunology. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. p. 68. ISBN 0-7817-9543-5.
- Sun M, Fink PJ (2007). "A new class of reverse signaling costimulators belongs to the TNF family". J Immunol. 179 (7): 4307–12. doi:10.4049/jimmunol.179.7.4307. PMID 17878324.
- Peitsch MC, Jongeneel CV (February 1993). "A 3-D model for the CD40 ligand predicts that it is a compact trimer similar to the tumor necrosis factors". Int. Immunol. 5 (2): 233–8. doi:10.1093/intimm/5.2.233. PMID 8095800.
- Farrah T, Smith CA (July 1992). "Emerging cytokine family". Nature 358 (6381): 26. doi:10.1038/358026b0. PMID 1377364.
- Bazan JF (September 1993). "Emerging families of cytokines and receptors". Curr. Biol. 3 (9): 603–6. doi:10.1016/0960-9822(93)90009-D. PMID 15335677.
- D. CAPUT, et al., Identification of a common nucleotide sequence in the 3'-untranslated region of mRNA molecules specifying inflammatory mediators, Proc. Natl. Acad. Sci. USA 83:1670-1674 Biochemistry, 1986 and references cited)
- Beutler B, Cerami A (October 1988). "The history, properties, and biological effects of cachectin". Biochemistry 27 (20): 7575–82. doi:10.1021/bi00420a001. PMID 3061461.
- Vilcek J, Lee TH (April 1991). "Tumor necrosis factor. New insights into the molecular mechanisms of its multiple actions". J. Biol. Chem. 266 (12): 7313–6. PMID 1850405.
- Browning JL, Ngam-ek A, Lawton P, DeMarinis J, Tizard R, Chow EP, Hession C, O'Brine-Greco B, Foley SF, Ware CF (March 1993). "Lymphotoxin beta, a novel member of the TNF family that forms a heteromeric complex with lymphotoxin on the cell surface". Cell 72 (6): 847–56. doi:10.1016/0092-8674(93)90574-A. PMID 7916655.
- Suda T, Takahashi T, Golstein P, Nagata S (December 1993). "Molecular cloning and expression of the Fas ligand, a novel member of the tumor necrosis factor family". Cell 75 (6): 1169–78. doi:10.1016/0092-8674(93)90326-L. PMID 7505205.
- Baum PR, Gayle RB, Ramsdell F, Srinivasan S, Sorensen RA, Watson ML, Seldin MF, Baker E, Sutherland GR, Clifford KN (September 1994). "Molecular characterization of murine and human OX40/OX40 ligand systems: identification of a human OX40 ligand as the HTLV-1-regulated protein gp34". EMBO J. 13 (17): 3992–4001. PMC 395319. PMID 8076595.
- Wiley SR, Schooley K, Smolak PJ, Din WS, Huang CP, Nicholl JK, Sutherland GR, Smith TD, Rauch C, Smith CA (December 1995). "Identification and characterization of a new member of the TNF family that induces apoptosis". Immunity 3 (6): 673–82. doi:10.1016/1074-7613(95)90057-8. PMID 8777713.
- Tumor Necrosis Factors at the US National Library of Medicine Medical Subject Headings (MeSH)
- pex1 tumor necrosis factor gene
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.
TNF(Tumour Necrosis Factor) family Provide feedback
No Pfam abstract.
Internal database links
|Similarity to PfamA using HHSearch:||C1q|
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR006052
Cytokines can be grouped into a family on the basis of sequence, functional and structural similarities [PUBMED:8095800, PUBMED:1377364, PUBMED:15335677]. Tumor necrosis factor (TNF) (also known as TNF-alpha or cachectin) is a monocyte-derived cytotoxin that has been implicated in tumour regression, septic shock and cachexia [PUBMED:2989794, PUBMED:3349526]. The protein is synthesised as a prohormone with an unusually long and atypical signal sequence, which is absent from the mature secreted cytokine [PUBMED:2268312]. A short hydrophobic stretch of amino acids serves to anchor the prohormone in lipid bilayers [PUBMED:2777790]. Both the mature protein and a partially-processed form of the hormone are secreted after cleavage of the propeptide [PUBMED:2777790].
There are a number of different families of TNF, but all these cytokines seem to form homotrimeric (or heterotrimeric in the case of LT-alpha/beta) complexes that are recognised by their specific receptors.
- Tumor Necrosis Factor (TNF) (also known as cachectin or TNF-alpha) [PUBMED:3061461, PUBMED:1850405] is a cytokine which has a wide variety of functions. It can cause cytolysis of certain tumor cell lines; it is involved in the induction of cachexia; it is a potent pyrogen, causing fever by direct action or by stimulation of interleukin-1 secretion; finally, it can stimulate cell proliferation and induce cell differentiation under certain conditions.
- Lymphotoxin-alpha (LT-alpha) and lymphotoxin-beta (LT-beta), two related cytokines produced by lymphocytes and which are cytotoxic for a wide range of tumor cells in vitro and in vivo [PUBMED:7916655].
- T cell antigen gp39 (CD40L), a cytokine which seems to be important in B-cell development and activation.
- CD27L, a cytokine which plays a role in T-cell activation. It induces the proliferation of costimulated T cells and enhances the generation of cytolytic T cells.
- CD30L, a cytokine which induces proliferation of T cells.
- FASL, a cytokine involved in cell death [PUBMED:7505205].
- 4-1BBL, a inducible T cell surface molecule that contributes to T-cell stimulation.
- OX40L, a cytokine that co-stimulates T cell proliferation and cytokine production [PUBMED:8076595].
- TNF-related apoptosis inducing ligand (TRAIL), a cytokine that induces apoptosis [PUBMED:8777713].
- TNF-alpha is synthesised as a type II membrane protein which then undergoes post-translational cleavage liberating the extracellular domain. CD27L, CD30L, CD40L, FASL, LT-beta, 4-1BBL and TRAIL also appear to be type II membrane proteins. LT-alpha is a secreted protein.
All these cytokines seem to form homotrimeric (or heterotrimeric in the case of LT-alpha/beta) complexes that are recognised by their specific receptors. The PROSITE pattern for this family is located in a beta-strand in the central section of the protein which is conserved across all members.
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Cellular component||membrane (GO:0016020)|
|Molecular function||tumor necrosis factor receptor binding (GO:0005164)|
|Biological process||immune response (GO:0006955)|
Below is a listing of the unique domain organisations or architectures in which this domain is found. More...
The graphic that is shown by default represents the longest sequence with a given architecture. Each row contains the following information:
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a textual description of the architecture, e.g. Gla, EGF x 2, Trypsin.
This example describes an architecture with one
Gladomain, followed by two consecutive
EGFdomains, and finally a single
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The members of the C1q and TNF superfamily are involved in a diverse set of functions, which include: defense, inflammation, apoptosis, autoimmunity differentiation, organogenesis, hibernation and insulin-resistant obesity . Both C1q and TNF domains form a compact jelly-roll beta- sandwich. The core of these structures are conserved between the two families and corresponds to the detectable sequence similarity. Proteins containing both of these domains, form trimers before they are active. However, the surfaces of the domains are quite different and this difference is thought to give rise to the function difference between the clan members.
The clan contains the following 2 members:C1q TNF
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...
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We make a range of alignments for each Pfam-A family:
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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.
1Cannot generate PP/Heatmap alignments for seeds; no PP data available
Key: available, not generated, — not available.
Format an alignment
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.
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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.
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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.
|Number in seed:||52|
|Number in full:||1178|
|Average length of the domain:||120.10 aa|
|Average identity of full alignment:||23 %|
|Average coverage of the sequence by the domain:||49.88 %|
|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:||13|
|Download:||download the raw HMM for this family|
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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 More....
This chart is a modified "sunburst" visualisation of the species tree for this family. It shows each node in the tree as a separate arc, arranged radially with the superkingdoms at the centre and the species arrayed around the outermost ring.
How the sunburst is generated
The tree is built by considering the taxonomic lineage of each sequence that has a match to this family. For each node in the resulting tree, we draw an arc in the sunburst. The radius of the arc, its distance from the root node at the centre of the sunburst, shows the taxonomic level ("superkingdom", "kingdom", etc). The length of the arc represents either the number of sequences represented at a given level, or the number of species that are found beneath the node in the tree. The weighting scheme can be changed using the sunburst controls.
In order to reduce the complexity of the representation, we reduce the number of taxonomic levels that we show. We consider only the following eight major taxonomic levels:
Colouring and labels
Segments of the tree are coloured approximately according to their superkingdom. For example, archeal branches are coloured with shades of orange, eukaryotes in shades of purple, etc. The colour assignments are shown under the sunburst controls. Where space allows, the name of the taxonomic level will be written on the arc itself.
As you move your mouse across the sunburst, the current node will be highlighted. In the top section of the controls panel we show a summary of the lineage of the currently highlighed node. If you pause over an arc, a tooltip will be shown, giving the name of the taxonomic level in the title and a summary of the number of sequences and species below that node in the tree.
Anomalies in the taxonomy tree
There are some situations that the sunburst tree cannot easily handle and for which we have work-arounds in place.
Missing taxonomic levels
Some species in the taxonomic tree may not have one or more of the main eight levels that we display. For example, Bos taurus is not assigned an order in the NCBI taxonomic tree. In such cases we mark the omitted level with, for example, "No order", in both the tooltip and the lineage summary.
Unmapped species names
The tree is built by looking at each sequence in the full alignment for the family. We take the name of the species given by UniProt and try to map that to the full taxonomic tree from NCBI. In some cases, the name chosen by UniProt does not map to any node in the NCBI tree, perhaps because the chosen name is listed as a synonym or a misspelling in the NCBI taxonomy.
So that these nodes are not simply omitted from the sunburst tree, we group them together in a separate branch (or segment of the sunburst tree). Since we cannot determine the lineage for these unmapped species, we show all levels between the superkingdom and the species as "uncategorised".
Since we reduce the species tree to only the eight main taxonomic levels, sequences that are mapped to the sub-species level in the tree would not normally be shown. Rather than leave out these species, we map them instead to their parent species. So, for example, for sequences belonging to one of the Vibrio cholerae sub-species in the NCBI taxonomy, we show them instead as belonging to the species Vibrio cholerae.
Too many species/sequences
For large species trees, you may see blank regions in the outer layers of the sunburst. These occur when there are large numbers of arcs to be drawn in a small space. If an arc is less than approximately one pixel wide, it will not be drawn and the space will be left blank. You may still be able to get some information about the species in that region by moving your mouse across the area, but since each arc will be very small, it will be difficult to accurately locate a particular species.
The tree shows the occurrence of this domain across different species. More...
We show the species tree in one of two ways. For smaller trees we try to show an interactive representation, which allows you to select specific nodes in the tree and view them as an alignment or as a set of Pfam domain graphics.
Unfortunately we have found that there are problems viewing the interactive tree when the it becomes larger than a certain limit. Furthermore, we have found that Internet Explorer can become unresponsive when viewing some trees, regardless of their size. We therefore show a text representation of the species tree when the size is above a certain limit or if you are using Internet Explorer to view the site.
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For all of the domain matches in a full alignment, we count the number that are found on all sequences in the alignment. This total is shown in the purple box.
We also count the number of unique sequences on which each domain is found, which is shown in green. Note that a domain may appear multiple times on the same sequence, leading to the difference between these two numbers.
Finally, we group sequences from the same organism according to the NCBI code that is assigned by UniProt, allowing us to count the number of distinct sequences on which the domain is found. This value is shown in the pink boxes.
We use the NCBI species tree to group organisms according to their taxonomy and this forms the structure of the displayed tree. Note that in some cases the trees are too large (have too many nodes) to allow us to build an interactive tree, but in most cases you can still view the tree in a plain text, non-interactive representation. Those species which are represented in the seed alignment for this domain are highlighted.
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There are 5 interactions for this family. More...
We determine these interactions using iPfam, which considers the interactions between residues in three-dimensional protein structures and maps those interactions back to Pfam families. You can find more information about the iPfam algorithm in the journal article that accompanies the website.
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 TNF domain has been found. There are 271 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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