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<!-- The PBB_Controls template provides controls for Protein Box Bot, please see Template:PBB_Controls for details. -->
{{Infobox_gene}}
{{PBB_Controls
'''Chemokine (C-C motif) ligand 3-like 1''', also known as '''CCL3L1''', is a [[protein]] which in humans is encoded by the ''CCL3L1'' [[gene]].<ref name="entrez">{{cite web | title = Entrez Gene: CCL3L1 chemokine (C-C motif) ligand 3-like 1| url = https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=6349}}</ref><ref name="pmid1972563">{{cite journal | vauthors = Irving SG, Zipfel PF, Balke J, McBride OW, Morton CC, Burd PR, Siebenlist U, Kelly K | title = Two inflammatory mediator cytokine genes are closely linked and variably amplified on chromosome 17q | journal = Nucleic Acids Research | volume = 18 | issue = 11 | pages = 3261–70 | date = June 1990 | pmid = 1972563 | pmc = 330932 | doi = 10.1093/nar/18.11.3261 }}</ref><ref name="pmid1296815">{{cite journal | vauthors = Hirashima M, Ono T, Nakao M, Nishi H, Kimura A, Nomiyama H, Hamada F, Yoshida MC, Shimada K | title = Nucleotide sequence of the third cytokine LD78 gene and mapping of all three LD78 gene loci to human chromosome 17 | journal = DNA Sequence : The Journal of DNA Sequencing and Mapping | volume = 3 | issue = 4 | pages = 203–12 | year = 1992 | pmid = 1296815 | doi = 10.3109/10425179209034019 }}</ref>
| update_page = yes
| require_manual_inspection = no
| update_protein_box = yes
| update_summary = yes
| update_citations = yes
}}


<!-- The GNF_Protein_box is automatically maintained by Protein Box Bot.  See Template:PBB_Controls to Stop updates. -->
== Function ==
{{GNF_Protein_box
| image = PBB_Protein_CCL3L1_image.jpg
| image_source = [[Protein_Data_Bank|PDB]] rendering based on 1b50.
| PDB = {{PDB2|1b50}}, {{PDB2|1b53}}
| Name = Chemokine (C-C motif) ligand 3-like 1
| HGNCid = 10628
| Symbol = CCL3L1
| AltSymbols =; 464.2; D17S1718; G0S19-2; LD78; LD78BETA; MGC104178; MGC12815; SCYA3L; SCYA3L1
| OMIM = 601395
| ECnumber = 
| Homologene = 2242
| MGIid = 98260
| Function = {{GNF_GO|id=GO:0008009 |text = chemokine activity}}
| Component = {{GNF_GO|id=GO:0005576 |text = extracellular region}} {{GNF_GO|id=GO:0005615 |text = extracellular space}}
| Process = {{GNF_GO|id=GO:0006935 |text = chemotaxis}} {{GNF_GO|id=GO:0006954 |text = inflammatory response}} {{GNF_GO|id=GO:0006955 |text = immune response}} {{GNF_GO|id=GO:0008285 |text = negative regulation of cell proliferation}}
| Orthologs = {{GNF_Ortholog_box
    | Hs_EntrezGene = 6349
    | Hs_Ensembl = 
    | Hs_RefseqProtein = NP_066286
    | Hs_RefseqmRNA = NM_021006
    | Hs_GenLoc_db = 
    | Hs_GenLoc_chr = 
    | Hs_GenLoc_start = 
    | Hs_GenLoc_end = 
    | Hs_Uniprot = 
    | Mm_EntrezGene = 20302
    | Mm_Ensembl = ENSMUSG00000000982
    | Mm_RefseqmRNA = NM_011337
    | Mm_RefseqProtein = NP_035467
    | Mm_GenLoc_db = 
    | Mm_GenLoc_chr = 11
    | Mm_GenLoc_start = 83464040
    | Mm_GenLoc_end = 83465552
    | Mm_Uniprot = Q3U6F9
  }}
}}
'''Chemokine (C-C motif) ligand 3-like 1''', also known as '''CCL3L1''', is a human [[gene]].<ref name="entrez">{{cite web | title = Entrez Gene: CCL3L1 chemokine (C-C motif) ligand 3-like 1| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=6349| accessdate = }}</ref>


<!-- The PBB_Summary template is automatically maintained by Protein Box Bot.  See Template:PBB_Controls to Stop updates. -->
This gene is one of several [[chemokine]] genes clustered on the q-arm of chromosome 17. Chemokines are a family of secreted proteins involved in [[Immune system#Physiological regulation|immunoregulatory]] and [[inflammation|inflammatory]] processes. Specifically, chemokines attract [[lymphocytes]] to sites of infection or damage.  This protein binds to several chemokine receptors including chemokine binding protein 2 ([[CCBP2]] or D6) and chemokine (C-C motif) receptor 5 ([[CCR5]]).
{{PBB_Summary
| section_title =
| summary_text = This gene is one of several cytokine genes clustered on the q-arm of chromosome 17. Cytokines are a family of secreted proteins involved in immunoregulatory and inflammatory processes. This protein binds to several chemokine receptors including chemokine binding protein 2 and chemokine (C-C motif) receptor 5 (CCR5). CCR5 is a co-receptor for HIV, and binding of this protein to CCR5 inhibits HIV entry. The copy number of this gene varies among individuals; most individuals have 1-6 copies in the diploid genome, although rare individuals have zero or more than six copies. The human genome reference assembly contains two full copies of the gene and a partial pseudogene. This record represents the more telomeric full-length gene.<ref name="entrez">{{cite web | title = Entrez Gene: CCL3L1 chemokine (C-C motif) ligand 3-like 1| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=6349| accessdate = }}</ref>
}}


==References==
CCR5 is a co-receptor for [[HIV]], and binding of CCL3L1 to CCR5 inhibits HIV entry. Furthermore, the binding causes the receptor to be taken inside the cell by [[endocytosis]], to eventually be reprocessed and re-expressed.<ref name="entrez" />
{{reflist|2}}
 
==Further reading==
== Gene organization ==
{{refbegin | 2}}
 
{{PBB_Further_reading
The human genome [[reference genome|reference assembly]] contains two full copies of the gene (CCL3L1 and CCL3L3) and an additional partial duplication, which is thought to result in a [[pseudogene]], designated CCL3L2. This record represents the more telomeric full-length gene.<ref name="entrez"/>
| citations =
 
*{{cite journal  | author=Hirashima M, Ono T, Nakao M, ''et al.'' |title=Nucleotide sequence of the third cytokine LD78 gene and mapping of all three LD78 gene loci to human chromosome 17. |journal=DNA Seq. |volume=3 |issue= 4 |pages= 203-12 |year= 1993 |pmid= 1296815 |doi= }}
== Clinical significance ==
*{{cite journal  | author=Nakao M, Nomiyama H, Shimada K |title=Structures of human genes coding for cytokine LD78 and their expression. |journal=Mol. Cell. Biol. |volume=10 |issue= 7 |pages= 3646-58 |year= 1990 |pmid= 1694014 |doi= }}
 
*{{cite journal | author=Irving SG, Zipfel PF, Balke J, ''et al.'' |title=Two inflammatory mediator cytokine genes are closely linked and variably amplified on chromosome 17q. |journal=Nucleic Acids Res. |volume=18 |issue= 11 |pages= 3261-70 |year= 1990 |pmid= 1972563 |doi= }}
The copy number of this gene varies among individuals. This is hypothesized to be due to segmental duplication of the region containing CCL3. Most individuals have 1-6 copies in the [[diploid]] genome, although rare individuals have zero or more than six copies. With increased copy number, there is more CCL3L1 expressed, and so competition for the CCR5 binding site is increased. This leads to slower advancement of disease in HIV-infected individuals, giving those with greater copy number more resistance.<ref name="entrez"/>
*{{cite journal  | author=Blum S, Forsdyke RE, Forsdyke DR |title=Three human homologs of a murine gene encoding an inhibitor of stem cell proliferation. |journal=DNA Cell Biol. |volume=9 |issue= 8 |pages= 589-602 |year= 1991 |pmid= 2271120 |doi= }}
 
*{{cite journal | author=Adams MD, Kerlavage AR, Fleischmann RD, ''et al.'' |title=Initial assessment of human gene diversity and expression patterns based upon 83 million nucleotides of cDNA sequence. |journal=Nature |volume=377 |issue= 6547 Suppl |pages= 3-174 |year= 1995 |pmid= 7566098 |doi= }}
== Interactions ==
*{{cite journal | author=Naruse K, Ueno M, Satoh T, ''et al.'' |title=A YAC contig of the human CC chemokine genes clustered on chromosome 17q11.2. |journal=Genomics |volume=34 |issue= 2 |pages= 236-40 |year= 1997 |pmid= 8661057 |doi= 10.1006/geno.1996.0274 }}
 
*{{cite journal | author=Nibbs RJ, Yang J, Landau NR, ''et al.'' |title=LD78beta, a non-allelic variant of human MIP-1alpha (LD78alpha), has enhanced receptor interactions and potent HIV suppressive activity. |journal=J. Biol. Chem. |volume=274 |issue= 25 |pages= 17478-83 |year= 1999 |pmid= 10364178 |doi= }}
CCL3L1 has been shown to [[Protein-protein interaction|interact]] with [[CCR5]].<ref name=pmid11734558>{{cite journal | vauthors = Miyakawa T, Obaru K, Maeda K, Harada S, Mitsuya H | title = Identification of amino acid residues critical for LD78beta, a variant of human macrophage inflammatory protein-1alpha, binding to CCR5 and inhibition of R5 human immunodeficiency virus type 1 replication | journal = The Journal of Biological Chemistry | volume = 277 | issue = 7 | pages = 4649–55 | date = Feb 2002 | pmid = 11734558 | doi = 10.1074/jbc.M109198200 }}</ref><ref name=pmid11449371>{{cite journal | vauthors = Struyf S, Menten P, Lenaerts JP, Put W, D'Haese A, De Clercq E, Schols D, Proost P, Van Damme J | title = Diverging binding capacities of natural LD78beta isoforms of macrophage inflammatory protein-1alpha to the CC chemokine receptors 1, 3 and 5 affect their anti-HIV-1 activity and chemotactic potencies for neutrophils and eosinophils | journal = European Journal of Immunology | volume = 31 | issue = 7 | pages = 2170–8 | date = Jul 2001 | pmid = 11449371 | doi = 10.1002/1521-4141(200107)31:7<2170::AID-IMMU2170>3.0.CO;2-D }}</ref>
*{{cite journal | author=Xin X, Shioda T, Kato A, ''et al.'' |title=Enhanced anti-HIV-1 activity of CC-chemokine LD78beta, a non-allelic variant of MIP-1alpha/LD78alpha. |journal=FEBS Lett. |volume=457 |issue= 2 |pages= 219-22 |year= 1999 |pmid= 10471782 |doi= }}
 
*{{cite journal  | author=Proost P, Menten P, Struyf S, ''et al.'' |title=Cleavage by CD26/dipeptidyl peptidase IV converts the chemokine LD78beta into a most efficient monocyte attractant and CCR1 agonist. |journal=Blood |volume=96 |issue= 5 |pages= 1674-80 |year= 2000 |pmid= 10961862 |doi= }}
== References ==
*{{cite journal | author=Lambeir AM, Proost P, Durinx C, ''et al.'' |title=Kinetic investigation of chemokine truncation by CD26/dipeptidyl peptidase IV reveals a striking selectivity within the chemokine family. |journal=J. Biol. Chem. |volume=276 |issue= 32 |pages= 29839-45 |year= 2001 |pmid= 11390394 |doi= 10.1074/jbc.M103106200 }}
{{reflist|33em}}
*{{cite journal | author=Struyf S, Menten P, Lenaerts JP, ''et al.'' |title=Diverging binding capacities of natural LD78beta isoforms of macrophage inflammatory protein-1alpha to the CC chemokine receptors 1, 3 and 5 affect their anti-HIV-1 activity and chemotactic potencies for neutrophils and eosinophils. |journal=Eur. J. Immunol. |volume=31 |issue= 7 |pages= 2170-8 |year= 2001 |pmid= 11449371 |doi= }}
 
*{{cite journal | author=Miyakawa T, Obaru K, Maeda K, ''et al.'' |title=Identification of amino acid residues critical for LD78beta, a variant of human macrophage inflammatory protein-1alpha, binding to CCR5 and inhibition of R5 human immunodeficiency virus type 1 replication. |journal=J. Biol. Chem. |volume=277 |issue= 7 |pages= 4649-55 |year= 2002 |pmid= 11734558 |doi= 10.1074/jbc.M109198200 }}
==External links==
*{{cite journal | author=Townson JR, Barcellos LF, Nibbs RJ |title=Gene copy number regulates the production of the human chemokine CCL3-L1. |journal=Eur. J. Immunol. |volume=32 |issue= 10 |pages= 3016-26 |year= 2002 |pmid= 12355456 |doi= 10.1002/1521-4141(2002010)32:10<3016::AID-IMMU3016>3.0.CO;2-D }}
* {{UCSC gene info|CCL3L1}}
*{{cite journal | author=Strausberg RL, Feingold EA, Grouse LH, ''et al.'' |title=Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=99 |issue= 26 |pages= 16899-903 |year= 2003 |pmid= 12477932 |doi= 10.1073/pnas.242603899 }}
 
*{{cite journal | author=Modi WS |title=CCL3L1 and CCL4L1 chemokine genes are located in a segmental duplication at chromosome 17q12. |journal=Genomics |volume=83 |issue= 4 |pages= 735-8 |year= 2004 |pmid= 15028295 |doi= 10.1016/j.ygeno.2003.09.019 }}
== Further reading ==
*{{cite journal | author=Zhang Z, Henzel WJ |title=Signal peptide prediction based on analysis of experimentally verified cleavage sites. |journal=Protein Sci. |volume=13 |issue= 10 |pages= 2819-24 |year= 2005 |pmid= 15340161 |doi= 10.1110/ps.04682504 }}
{{refbegin|33em}}
*{{cite journal | author=Gerhard DS, Wagner L, Feingold EA, ''et al.'' |title=The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). |journal=Genome Res. |volume=14 |issue= 10B |pages= 2121-7 |year= 2004 |pmid= 15489334 |doi= 10.1101/gr.2596504 }}
* {{cite journal | vauthors = Hirashima M, Ono T, Nakao M, Nishi H, Kimura A, Nomiyama H, Hamada F, Yoshida MC, Shimada K | title = Nucleotide sequence of the third cytokine LD78 gene and mapping of all three LD78 gene loci to human chromosome 17 | journal = DNA Sequence : The Journal of DNA Sequencing and Mapping | volume = 3 | issue = 4 | pages = 203–12 | year = 1993 | pmid = 1296815 | doi = 10.3109/10425179209034019 }}
*{{cite journal | author=Gonzalez E, Kulkarni H, Bolivar H, ''et al.'' |title=The influence of CCL3L1 gene-containing segmental duplications on HIV-1/AIDS susceptibility. |journal=Science |volume=307 |issue= 5714 |pages= 1434-40 |year= 2005 |pmid= 15637236 |doi= 10.1126/science.1101160 }}
* {{cite journal | vauthors = Nakao M, Nomiyama H, Shimada K | title = Structures of human genes coding for cytokine LD78 and their expression | journal = Molecular and Cellular Biology | volume = 10 | issue = 7 | pages = 3646–58  | date = Jul 1990 | pmid = 1694014 | pmc = 360801 }}
*{{cite journal | author=Ryu OH, Choi SJ, Firatli E, ''et al.'' |title=Proteolysis of macrophage inflammatory protein-1alpha isoforms LD78beta and LD78alpha by neutrophil-derived serine proteases. |journal=J. Biol. Chem. |volume=280 |issue= 17 |pages= 17415-21 |year= 2005 |pmid= 15728180 |doi= 10.1074/jbc.M500340200 }}
* {{cite journal | vauthors = Irving SG, Zipfel PF, Balke J, McBride OW, Morton CC, Burd PR, Siebenlist U, Kelly K | title = Two inflammatory mediator cytokine genes are closely linked and variably amplified on chromosome 17q | journal = Nucleic Acids Research | volume = 18 | issue = 11 | pages = 3261–70  | date = June 1990 | pmid = 1972563 | pmc = 330932 | doi = 10.1093/nar/18.11.3261 }}
*{{cite journal | author=Burns JC, Shimizu C, Gonzalez E, ''et al.'' |title=Genetic variations in the receptor-ligand pair CCR5 and CCL3L1 are important determinants of susceptibility to Kawasaki disease. |journal=J. Infect. Dis. |volume=192 |issue= 2 |pages= 344-9 |year= 2005 |pmid= 15962231 |doi= 10.1086/430953 }}
* {{cite journal | vauthors = Blum S, Forsdyke RE, Forsdyke DR | title = Three human homologs of a murine gene encoding an inhibitor of stem cell proliferation | journal = DNA and Cell Biology | volume = 9 | issue = 8 | pages = 589–602 | year = | date = March 2009 | pmid = 2271120 | doi = 10.1089/dna.1990.9.589 }}
}}
* {{cite journal | vauthors = Adams MD, Kerlavage AR, Fleischmann RD, Fuldner RA, Bult CJ, Lee NH, Kirkness EF, Weinstock KG, Gocayne JD, White O | title = Initial assessment of human gene diversity and expression patterns based upon 83 million nucleotides of cDNA sequence | journal = Nature | volume = 377 | issue = 6547 Suppl | pages = 3–174  | date = Sep 1995 | pmid = 7566098 | doi = <!-- none available --> | url = http://www.columbia.edu/itc/biology/pollack/w4065/client_edit/readings/nature377_3.pdf | format = PDF }}
* {{cite journal | vauthors = Naruse K, Ueno M, Satoh T, Nomiyama H, Tei H, Takeda M, Ledbetter DH, Coillie EV, Opdenakker G, Gunge N, Sakaki Y, Iio M, Miura R | title = A YAC contig of the human CC chemokine genes clustered on chromosome 17q11.2 | journal = Genomics | volume = 34 | issue = 2 | pages = 236–40 | year = | date = June 1996 | pmid = 8661057 | doi = 10.1006/geno.1996.0274 }}
* {{cite journal | vauthors = Nibbs RJ, Yang J, Landau NR, Mao JH, Graham GJ | title = LD78beta, a non-allelic variant of human MIP-1alpha (LD78alpha), has enhanced receptor interactions and potent HIV suppressive activity | journal = The Journal of Biological Chemistry | volume = 274 | issue = 25 | pages = 17478–83  | date = June 1999 | pmid = 10364178 | doi = 10.1074/jbc.274.25.17478 }}
* {{cite journal | vauthors = Xin X, Shioda T, Kato A, Liu H, Sakai Y, Nagai Y | title = Enhanced anti-HIV-1 activity of CC-chemokine LD78beta, a non-allelic variant of MIP-1alpha/LD78alpha | journal = FEBS Letters | volume = 457 | issue = 2 | pages = 219–22  | date = Aug 1999 | pmid = 10471782 | doi = 10.1016/S0014-5793(99)01035-2 }}
* {{cite journal | vauthors = Proost P, Menten P, Struyf S, Schutyser E, De Meester I, Van Damme J | title = Cleavage by CD26/dipeptidyl peptidase IV converts the chemokine LD78beta into a most efficient monocyte attractant and CCR1 agonist | journal = Blood | volume = 96 | issue = 5 | pages = 1674–80  | date = Sep 2000 | pmid = 10961862 }}
* {{cite journal | vauthors = Lambeir AM, Proost P, Durinx C, Bal G, Senten K, Augustyns K, Scharpé S, Van Damme J, De Meester I | title = Kinetic investigation of chemokine truncation by CD26/dipeptidyl peptidase IV reveals a striking selectivity within the chemokine family | journal = The Journal of Biological Chemistry | volume = 276 | issue = 32 | pages = 29839–45  | date = Aug 2001 | pmid = 11390394 | doi = 10.1074/jbc.M103106200 }}
* {{cite journal | vauthors = Struyf S, Menten P, Lenaerts JP, Put W, D'Haese A, De Clercq E, Schols D, Proost P, Van Damme J | title = Diverging binding capacities of natural LD78beta isoforms of macrophage inflammatory protein-1alpha to the CC chemokine receptors 1, 3 and 5 affect their anti-HIV-1 activity and chemotactic potencies for neutrophils and eosinophils | journal = European Journal of Immunology | volume = 31 | issue = 7 | pages = 2170–8 | date = Jul 2001 | pmid = 11449371 | doi = 10.1002/1521-4141(200107)31:7<2170::AID-IMMU2170>3.0.CO;2-D }}
* {{cite journal | vauthors = Miyakawa T, Obaru K, Maeda K, Harada S, Mitsuya H | title = Identification of amino acid residues critical for LD78beta, a variant of human macrophage inflammatory protein-1alpha, binding to CCR5 and inhibition of R5 human immunodeficiency virus type 1 replication | journal = The Journal of Biological Chemistry | volume = 277 | issue = 7 | pages = 4649–55  | date = Feb 2002 | pmid = 11734558 | doi = 10.1074/jbc.M109198200 }}
* {{cite journal | vauthors = Townson JR, Barcellos LF, Nibbs RJ | title = Gene copy number regulates the production of the human chemokine CCL3-L1 | journal = European Journal of Immunology | volume = 32 | issue = 10 | pages = 3016–26  | date = October 2002 | pmid = 12355456 | doi = 10.1002/1521-4141(2002010)32:10<3016::AID-IMMU3016>3.0.CO;2-D }}
* {{cite journal | vauthors = Modi WS | title = CCL3L1 and CCL4L1 chemokine genes are located in a segmental duplication at chromosome 17q12 | journal = Genomics | volume = 83 | issue = 4 | pages = 735–8  | date = Apr 2004 | pmid = 15028295 | doi = 10.1016/j.ygeno.2003.09.019 }}
* {{cite journal | vauthors = Zhang Z, Henzel WJ | title = Signal peptide prediction based on analysis of experimentally verified cleavage sites | journal = Protein Science | volume = 13 | issue = 10 | pages = 2819–24 | year = | date = October 2004 | pmid = 15340161 | pmc = 2286551 | doi = 10.1110/ps.04682504 }}
* {{cite journal | vauthors = Gonzalez E, Kulkarni H, Bolivar H, Mangano A, Sanchez R, Catano G, Nibbs RJ, Freedman BI, Quinones MP, Bamshad MJ, Murthy KK, Rovin BH, Bradley W, Clark RA, Anderson SA, O'connell RJ, Agan BK, Ahuja SS, Bologna R, Sen L, Dolan MJ, Ahuja SK | title = The influence of CCL3L1 gene-containing segmental duplications on HIV-1/AIDS susceptibility | journal = Science | volume = 307 | issue = 5714 | pages = 1434–40  | date = Mar 2005 | pmid = 15637236 | doi = 10.1126/science.1101160 }}
* {{cite journal | vauthors = Ryu OH, Choi SJ, Firatli E, Choi SW, Hart PS, Shen RF, Wang G, Wu WW, Hart TC | title = Proteolysis of macrophage inflammatory protein-1alpha isoforms LD78beta and LD78alpha by neutrophil-derived serine proteases | journal = The Journal of Biological Chemistry | volume = 280 | issue = 17 | pages = 17415–21  | date = Apr 2005 | pmid = 15728180 | doi = 10.1074/jbc.M500340200 }}
* {{cite journal | vauthors = Burns JC, Shimizu C, Gonzalez E, Kulkarni H, Patel S, Shike H, Sundel RS, Newburger JW, Ahuja SK | title = Genetic variations in the receptor-ligand pair CCR5 and CCL3L1 are important determinants of susceptibility to Kawasaki disease | journal = The Journal of Infectious Diseases | volume = 192 | issue = 2 | pages = 344–9  | date = Jul 2005 | pmid = 15962231 | pmc = 2894631 | doi = 10.1086/430953 }}
{{refend}}
{{refend}}
 
{{PDB Gallery|geneid=6349}}
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Latest revision as of 02:04, 27 October 2017

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Identifiers
Aliases
External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

n/a

n/a

RefSeq (protein)

n/a

n/a

Location (UCSC)n/an/a
PubMed searchn/an/a
Wikidata
View/Edit Human

Chemokine (C-C motif) ligand 3-like 1, also known as CCL3L1, is a protein which in humans is encoded by the CCL3L1 gene.[1][2][3]

Function

This gene is one of several chemokine genes clustered on the q-arm of chromosome 17. Chemokines are a family of secreted proteins involved in immunoregulatory and inflammatory processes. Specifically, chemokines attract lymphocytes to sites of infection or damage. This protein binds to several chemokine receptors including chemokine binding protein 2 (CCBP2 or D6) and chemokine (C-C motif) receptor 5 (CCR5).

CCR5 is a co-receptor for HIV, and binding of CCL3L1 to CCR5 inhibits HIV entry. Furthermore, the binding causes the receptor to be taken inside the cell by endocytosis, to eventually be reprocessed and re-expressed.[1]

Gene organization

The human genome reference assembly contains two full copies of the gene (CCL3L1 and CCL3L3) and an additional partial duplication, which is thought to result in a pseudogene, designated CCL3L2. This record represents the more telomeric full-length gene.[1]

Clinical significance

The copy number of this gene varies among individuals. This is hypothesized to be due to segmental duplication of the region containing CCL3. Most individuals have 1-6 copies in the diploid genome, although rare individuals have zero or more than six copies. With increased copy number, there is more CCL3L1 expressed, and so competition for the CCR5 binding site is increased. This leads to slower advancement of disease in HIV-infected individuals, giving those with greater copy number more resistance.[1]

Interactions

CCL3L1 has been shown to interact with CCR5.[4][5]

References

  1. 1.0 1.1 1.2 1.3 "Entrez Gene: CCL3L1 chemokine (C-C motif) ligand 3-like 1".
  2. Irving SG, Zipfel PF, Balke J, McBride OW, Morton CC, Burd PR, Siebenlist U, Kelly K (June 1990). "Two inflammatory mediator cytokine genes are closely linked and variably amplified on chromosome 17q". Nucleic Acids Research. 18 (11): 3261–70. doi:10.1093/nar/18.11.3261. PMC 330932. PMID 1972563.
  3. Hirashima M, Ono T, Nakao M, Nishi H, Kimura A, Nomiyama H, Hamada F, Yoshida MC, Shimada K (1992). "Nucleotide sequence of the third cytokine LD78 gene and mapping of all three LD78 gene loci to human chromosome 17". DNA Sequence : The Journal of DNA Sequencing and Mapping. 3 (4): 203–12. doi:10.3109/10425179209034019. PMID 1296815.
  4. Miyakawa T, Obaru K, Maeda K, Harada S, Mitsuya H (Feb 2002). "Identification of amino acid residues critical for LD78beta, a variant of human macrophage inflammatory protein-1alpha, binding to CCR5 and inhibition of R5 human immunodeficiency virus type 1 replication". The Journal of Biological Chemistry. 277 (7): 4649–55. doi:10.1074/jbc.M109198200. PMID 11734558.
  5. Struyf S, Menten P, Lenaerts JP, Put W, D'Haese A, De Clercq E, Schols D, Proost P, Van Damme J (Jul 2001). "Diverging binding capacities of natural LD78beta isoforms of macrophage inflammatory protein-1alpha to the CC chemokine receptors 1, 3 and 5 affect their anti-HIV-1 activity and chemotactic potencies for neutrophils and eosinophils". European Journal of Immunology. 31 (7): 2170–8. doi:10.1002/1521-4141(200107)31:7<2170::AID-IMMU2170>3.0.CO;2-D. PMID 11449371.

External links

Further reading