CD22

CD22
Identifiers
Aliases	CD22, SIGLEC-2, SIGLEC2, CD22 molecule
External IDs	OMIM: 107266 MGI: 88322 HomoloGene: 31052 GeneCards: CD22
Gene location (Mouse)
Chr.	Chromosome 7 (mouse)
End	30,579,767 bp
RNA expression pattern
	Top expressed in
	spleen; ; appendix; ; lymph node; ; right uterine tube; ; sural nerve; ; corpus callosum; ; putamen; ; inferior olivary nucleus; ; caudate nucleus; ; amygdala;
	Top expressed in
	spleen; ; blood; ; subcutaneous adipose tissue; ; submandibular gland; ; calvaria; ; morula; ; bone marrow; ; white adipose tissue; ; right lung lobe; ; thymus;
	More reference expression data
	; ; ; ;
	More reference expression data
Gene ontology
Molecular function	protein binding; carbohydrate binding; IgM binding; signaling receptor binding; protein phosphatase binding; sialic acid binding; CD4 receptor binding;
Cellular component	integral component of membrane; plasma membrane; extracellular exosome; membrane; cytoplasm; early endosome; cell surface; neuronal cell body membrane; recycling endosome;
Biological process	cell adhesion; regulation of endocytosis; regulation of B cell proliferation; B cell activation; regulation of immune response; negative regulation of calcium-mediated signaling; negative regulation of B cell receptor signaling pathway;
	Sources:Amigo / QuickGO
Orthologs
	933
	12483
	n/a
	ENSMUSG00000030577
	P20273
	P35329
NM_024916; NM_001185099; NM_001185100; NM_001185101; NM_001278417;
	NM_001771
	NM_001043317; NM_009845
	NP_001172028; NP_001172029; NP_001172030; NP_001265346; NP_001762
	NP_001036782; NP_033975
	Wikidata
View/Edit Human	View/Edit Mouse

CD22, or cluster of differentiation-22, is a molecule belonging to the SIGLEC family of lectins.^[4] It is found on the surface of mature B cells and to a lesser extent on some immature B cells. Generally speaking, CD22 is a regulatory molecule that prevents the overactivation of the immune system and the development of autoimmune diseases.^[5]

CD22 is a sugar binding transmembrane protein, which specifically binds sialic acid with an immunoglobulin (Ig) domain located at its N-terminus. The presence of Ig domains makes CD22 a member of the immunoglobulin superfamily. CD22 functions as an inhibitory receptor for B cell receptor (BCR) signaling. It is also involved in the B cell trafficking to Peyer's patches in mice.^[6]

An immunotoxin, BL22, that targets this receptor is being tested at the NIH.^[7]

External links

CD22+Antigen at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

Interactions

CD22 has been shown to interact with Grb2,^[8]^[9] PTPN6,^[9]^[10]^[11]^[12]^[13] LYN,^[8]^[11] SHC1^[8] and INPP5D.^[8]

References

Template:Research help

^ ^a ^b ^c GRCm38: Ensembl release 89: ENSMUSG00000030577 – Ensembl, May 2017
^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ Crocker PR, Clark EA, Filbin M, Gordon S, Jones Y, Kehrl JH, Kelm S, Le Douarin N, Powell L, Roder J, Schnaar RL, Sgroi DC, Stamenkovic K, Schauer R, Schachner M, van den Berg TK, van der Merwe PA, Watt SM, Varki A (February 1998). "Siglecs: a family of sialic-acid binding lectins". Glycobiology. 8 (2): v. doi:10.1093/glycob/8.2.0. PMID 9498912. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
^ Hatta; et al. (1999). "Identification of the gene variations in human CD22".
^ Lee M, Kiefel H, LaJevic MD, Macauley MS, Kawashima H, O'Hara E, Pan J, Paulson JC, Butcher EC (October 2014). "Transcriptional programs of lymphoid tissue capillary and high endothelium reveal control mechanisms for lymphocyte homing". Nature Immunology. 15 (10): 982–95. doi:10.1038/ni.2983. PMID 25173345.
^ "BL22 Immunotoxin in Treating Patients Previously Treated With Cladribine for Hairy Cell Leukemia". ClinicalTrials.gov - U.S. National Institutes of Health. Retrieved 2008-02-19.
^ ^a ^b ^c ^d Poe JC, Fujimoto M, Jansen PJ, Miller AS, Tedder TF (June 2000). "CD22 forms a quaternary complex with SHIP, Grb2, and Shc. A pathway for regulation of B lymphocyte antigen receptor-induced calcium flux". The Journal of Biological Chemistry. 275 (23): 17420–7. doi:10.1074/jbc.M001892200. PMID 10748054.{{cite journal}}: CS1 maint: unflagged free DOI (link)
^ ^a ^b Otipoby KL, Draves KE, Clark EA (November 2001). "CD22 regulates B cell receptor-mediated signals via two domains that independently recruit Grb2 and SHP-1". The Journal of Biological Chemistry. 276 (47): 44315–22. doi:10.1074/jbc.M105446200. PMID 11551923.{{cite journal}}: CS1 maint: unflagged free DOI (link)
^ Blasioli J, Paust S, Thomas ML (January 1999). "Definition of the sites of interaction between the protein tyrosine phosphatase SHP-1 and CD22". The Journal of Biological Chemistry. 274 (4): 2303–7. doi:10.1074/jbc.274.4.2303. PMID 9890995.{{cite journal}}: CS1 maint: unflagged free DOI (link)
^ ^a ^b Greer SF, Justement LB (May 1999). "CD45 regulates tyrosine phosphorylation of CD22 and its association with the protein tyrosine phosphatase SHP-1". Journal of Immunology. 162 (9): 5278–86. PMID 10228003.
^ Law CL, Sidorenko SP, Chandran KA, Zhao Z, Shen SH, Fischer EH, Clark EA (February 1996). "CD22 associates with protein tyrosine phosphatase 1C, Syk, and phospholipase C-gamma(1) upon B cell activation". The Journal of Experimental Medicine. 183 (2): 547–60. doi:10.1084/jem.183.2.547. PMC 2192439. PMID 8627166.
^ Adachi T, Wienands J, Wakabayashi C, Yakura H, Reth M, Tsubata T (July 2001). "SHP-1 requires inhibitory co-receptors to down-modulate B cell antigen receptor-mediated phosphorylation of cellular substrates". The Journal of Biological Chemistry. 276 (28): 26648–55. doi:10.1074/jbc.M100997200. PMID 11356834.{{cite journal}}: CS1 maint: unflagged free DOI (link)

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[refGRCm38Ensembl-1] GRCm38: Ensembl release 89: ENSMUSG00000030577 – Ensembl, May 2017

[2] "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.

[3] "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.

[pmid9498912-4] Crocker PR, Clark EA, Filbin M, Gordon S, Jones Y, Kehrl JH, Kelm S, Le Douarin N, Powell L, Roder J, Schnaar RL, Sgroi DC, Stamenkovic K, Schauer R, Schachner M, van den Berg TK, van der Merwe PA, Watt SM, Varki A (February 1998). "Siglecs: a family of sialic-acid binding lectins". Glycobiology. 8 (2): v. doi:10.1093/glycob/8.2.0. PMID 9498912. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)

[Hatta1999-5] Hatta; et al. (1999). "Identification of the gene variations in human CD22".

[6] Lee M, Kiefel H, LaJevic MD, Macauley MS, Kawashima H, O'Hara E, Pan J, Paulson JC, Butcher EC (October 2014). "Transcriptional programs of lymphoid tissue capillary and high endothelium reveal control mechanisms for lymphocyte homing". Nature Immunology. 15 (10): 982–95. doi:10.1038/ni.2983. PMID 25173345.

[titleBL22_Immunotoxin_in_Treating_Patients_Previously_Treated_With_Cladribine_for_Hairy_Cell_Leukemia_-_Full_Text_View_-_ClinicalTrials.gov-7] "BL22 Immunotoxin in Treating Patients Previously Treated With Cladribine for Hairy Cell Leukemia". ClinicalTrials.gov - U.S. National Institutes of Health. Retrieved 2008-02-19.

[pmid10748054-8] Poe JC, Fujimoto M, Jansen PJ, Miller AS, Tedder TF (June 2000). "CD22 forms a quaternary complex with SHIP, Grb2, and Shc. A pathway for regulation of B lymphocyte antigen receptor-induced calcium flux". The Journal of Biological Chemistry. 275 (23): 17420–7. doi:10.1074/jbc.M001892200. PMID 10748054.{{cite journal}}: CS1 maint: unflagged free DOI (link)

[pmid11551923-9] Otipoby KL, Draves KE, Clark EA (November 2001). "CD22 regulates B cell receptor-mediated signals via two domains that independently recruit Grb2 and SHP-1". The Journal of Biological Chemistry. 276 (47): 44315–22. doi:10.1074/jbc.M105446200. PMID 11551923.{{cite journal}}: CS1 maint: unflagged free DOI (link)

[pmid9890995-10] Blasioli J, Paust S, Thomas ML (January 1999). "Definition of the sites of interaction between the protein tyrosine phosphatase SHP-1 and CD22". The Journal of Biological Chemistry. 274 (4): 2303–7. doi:10.1074/jbc.274.4.2303. PMID 9890995.{{cite journal}}: CS1 maint: unflagged free DOI (link)

[pmid10228003-11] Greer SF, Justement LB (May 1999). "CD45 regulates tyrosine phosphorylation of CD22 and its association with the protein tyrosine phosphatase SHP-1". Journal of Immunology. 162 (9): 5278–86. PMID 10228003.

[pmid8627166-12] Law CL, Sidorenko SP, Chandran KA, Zhao Z, Shen SH, Fischer EH, Clark EA (February 1996). "CD22 associates with protein tyrosine phosphatase 1C, Syk, and phospholipase C-gamma(1) upon B cell activation". The Journal of Experimental Medicine. 183 (2): 547–60. doi:10.1084/jem.183.2.547. PMC 2192439. PMID 8627166.

[pmid11356834-13] Adachi T, Wienands J, Wakabayashi C, Yakura H, Reth M, Tsubata T (July 2001). "SHP-1 requires inhibitory co-receptors to down-modulate B cell antigen receptor-mediated phosphorylation of cellular substrates". The Journal of Biological Chemistry. 276 (28): 26648–55. doi:10.1074/jbc.M100997200. PMID 11356834.{{cite journal}}: CS1 maint: unflagged free DOI (link)

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v t e Proteins: clusters of differentiation (see also list of human clusters of differentiation)
1–50	CD1 a-c 1A 1B 1D 1E CD2 CD3 γ δ ε CD4 CD5 CD6 CD7 CD8 a CD9 CD10 CD11 a b c d CD13 CD14 CD15 CD16 A B CD18 CD19 CD20 CD21 CD22 CD23 CD24 CD25 CD26 CD27 CD28 CD29 CD30 CD31 CD32 A B CD33 CD34 CD35 CD36 CD37 CD38 CD39 CD40 CD41 CD42 a b c d CD43 CD44 CD45 CD46 CD47 CD48 CD49 a b c d e f CD50
51–100	CD51 CD52 CD53 CD54 CD55 CD56 CD57 CD58 CD59 CD61 CD62 E L P CD63 CD64 A B C CD66 a b c d e f CD68 CD69 CD70 CD71 CD72 CD73 CD74 CD78 CD79 a b CD80 CD81 CD82 CD83 CD84 CD85 a d e h j k CD86 CD87 CD88 CD89 CD90 CD91 - CD92 CD93 CD94 CD95 CD96 CD97 CD98 CD99 CD100
101–150	CD101 CD102 CD103 CD104 CD105 CD106 CD107 a b CD108 CD109 CD110 CD111 CD112 CD113 CD114 CD115 CD116 CD117 CD118 CD119 CD120 a b CD121 a b CD122 CD123 CD124 CD125 CD126 CD127 CD129 CD130 CD131 CD132 CD133 CD134 CD135 CD136 CD137 CD138 CD140b CD141 CD142 CD143 CD144 CD146 CD147 CD148 CD150
151–200	CD151 CD152 CD153 CD154 CD155 CD156 a b c CD157 CD158 (a d e i k) CD159 a c CD160 CD161 CD162 CD163 CD164 CD166 CD167 a b CD168 CD169 CD170 CD171 CD172 a b g CD174 CD177 CD178 CD179 a b CD180 CD181 CD182 CD183 CD184 CD185 CD186 CD191 CD192 CD193 CD194 CD195 CD196 CD197 CDw198 CDw199 CD200
201–250	CD201 CD202b CD204 CD205 CD206 CD207 CD208 CD209 CDw210 a b CD212 CD213a 1 2 CD217 CD218 (a b) CD220 CD221 CD222 CD223 CD224 CD225 CD226 CD227 CD228 CD229 CD230 CD233 CD234 CD235 a b CD236 CD238 CD239 CD240CE CD240D CD241 CD243 CD244 CD246 CD247 - CD248 CD249
251–300	CD252 CD253 CD254 CD256 CD257 CD258 CD261 CD262 CD263 CD264 CD265 CD266 CD267 CD268 CD269 CD271 CD272 CD273 CD274 CD275 CD276 CD278 CD279 CD280 CD281 CD282 CD283 CD284 CD286 CD288 CD289 CD290 CD292 CDw293 CD294 CD295 CD297 CD298 CD299
301–350	CD300A CD301 CD302 CD303 CD304 CD305 CD306 CD307 CD309 CD312 CD314 CD315 CD316 CD317 CD318 CD320 CD321 CD322 CD324 CD325 CD326 CD327 CD328 CD329 CD331 CD332 CD333 CD334 CD335 CD336 CD337 CD338 CD339 CD340 CD344 CD349 CD350