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. 2021 Jan 29;11(2):188. doi: 10.3390/biom11020188

Table 6.

Human I-type lectins, their carbohydrate ligands and protein expression in the organs.

Common Name
(HUGO Name if Different)
Gene Symbol Carbohydrate Preferential Affinity Protein Expression in the Organs
Siglecl1 (Sialic acid binding Ig like lectin 1) SIGLEC1 α-(2-3)-Sialic acid, α-(2-6)-Sialic acid, α-(2-8)-Sialic acid [94] Bone marrow, lung
Siglec2 (CD22 molecule) a) CD22 α-(2-6)-Sialic acid [95,96] Appendix, lymph node, spleen, tonsil
Siglec3 (CD33 molecule) CD33 α-(2-6)-Sialic acid, α-(2-3)-Sialic acid [97] Appendix, bone marrow, lung, lymph node, skin, spleen, tonsil
Siglec4a, MAG (Myelin associated glycoprotein) MAG α-(2-3)-Sialic acid [98] Brain
Siglec5 (Sialic acid binding Ig like lectin 5) SIGLEC5 α-(2-3)-Sialic acid, α-(2-6)-Sialic acid, α-(2-8)-Sialic acid [99] Bone marrow, lymph node, placenta, spleen, tonsil
Siglec6 (Sialic acid binding Ig like lectin 6) SIGLEC6 Sialic acid-α-(2-6)-N-acetylgalactosamine (Sialyl-Tn) [100] Placenta
Siglec7 SIGLEC7 α-(2-6)-Sialic acid, α-(2-8)-Sialic acid, α-(2-3)-Sialic acid [101] and disialogangliosides [102,103,104] b)
Siglec8 SIGLEC8 α-(2-3)-Sialic acid, α-(2-6)-Sialic acid [105] Adipose and soft tissue, bone marrow and lymphoid tissues, brain, endocrine tissues, female tissues, gastrointestinal tract, kidney and urinary bladder, lung, male tissues, muscle tissues, pancreas, proximal digestive tract, skin
Siglec9 (Sialic acid binding Ig like lectin 9) SIGLEC9 α-(2-3)-Sialic acid, Sialyl Lewis x, α-(2-6)-Sialic acid, α-(2-8)-Sialic acid [106] Adipose and soft tissue, bone marrow and lymphoid tissues, brain, endocrine tissues, female tissues, gastrointestinal tract, kidney and urinary bladder, lung, male tissues, muscle tissues, pancreas, proximal digestive tract, skin
Siglec10 (Sialic acid binding Ig like lectin 10) SIGLEC10 α-(2-3)-Sialic acid, α-(2-6)-Sialic acid [107] Appendix, bone marrow, lymph node, soft tissue, spleen, tonsil
Siglec11 (Sialic acid binding Ig like lectin 11) SIGLEC11 α-(2-8)-Sialic acid [101] b)
Siglec14 (Sialic acid binding Ig like lectin 14) SIGLEC14 Sialic acid- α-(2-6)-N-acetylgalactosamine (Sialyl-Tn), N-acetylneuraminic acid [108] Adipose and soft tissue, bone marrow and lymphoid tissues, brain, endocrine tissues, gastrointestinal tract, kidney and urinary bladder, lung, male tissues, muscle tissues, pancreas, proximal digestive tract, skin
Siglec15 (Sialic acid binding Ig like lectin 15) SIGLEC15 Sialyl-Tn [109] b)
CD2 molecule a) CD2 N-glycans with fucose [110] Appendix, lymph node, spleen, tonsil
CD83 molecule CD83 Sialic acid [111] Appendix, bone marrow, lung, lymph node, spleen, tonsil
Intercellular adhesion molecule 1 ICAM1 Hyaluronan [112] Appendix, bone marrow, brain, endometrium, fallopian tube, kidney, lung, lymph node, spleen, testis, tonsil
L1 cell adhesion molecule L1CAM α-(2-3)-Sialic acid [113] Adipose and soft tissue, bone marrow and lymphoid tissues, brain, female tissues, gastrointestinal tract, kidney and urinary bladder, lung, male tissues, muscle tissues, proximal digestive tract, skin
Myelin protein zero MPZ SO4 –3GlucA-β-(1-3)-Gal-β-(1–4)-GlcNAc (HNK-1 antigen) [101] Bronchus, esophagus, fallopian tube, small intestine, soft tissue, stomach, testis
Neural cell adhesion molecule 1 NCAM1 High N-linked d-mannose [114] Brain, colon, hearth muscle, pancreas, smooth muscle, soft tissue, thyroid gland
Neural cell adhesion molecule 2 NCAM2 c) Brain, bronchus, colon, duodenum, gallbladder, ovary, rectum, small intestine, soft tissue, testis

a) FDA-approved drug target. b) Only RNA expression data available in The Human Protein Atlas [16,17] and GeneCards [18] databases. c) Carbohydrate moieties recognized by this protein have not been discovered yet.