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CD22
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  • CD22
PROTEIN STRUCTURE
ANTIBODIES
AND
VALIDATION
Protein structures
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

CD22
Synonyms SIGLEC-2, SIGLEC2
Gene descriptioni

Full gene name according to HGNC.

CD22 molecule
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Read more
CD markers
FDA approved drug targets
Plasma proteins
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.

  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Read more
Intracellular,Membrane
Protein evidence Evidence at protein level (all genes)
GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Chromosome 19
Cytoband q13.12
Chromosome location (bp) 35319261 - 35347361
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

14
Ensembl ENSG00000012124 (version 103.38)
Entrez gene 933
HGNC HGNC:1643
UniProt P20273 (UniProt - Evidence at protein level)
neXtProt NX_P20273
Antibodypedia CD22 antibodies


PROTEIN STRUCTUREi

The Structure section provides predicted structures from the Alphafold protein structure database and available experimental structures from Protein Data Bank (PDB).

In the Structure drop-down menu all experimental structures from PDB are available for selection and display. The structures are displayed using the NGL Viewer and can be zoomed-in and rotated either manually or by checking the Autorotate box. The Color scheme can be selected to show the residue index, chain name or confidence score (as B-factors and pLDDT score for experimental and predicted structures, respectively). The positions for available antigen sequences in the structure are shown if Antigens is turned to ON, and the Variants slider can be used to show the positions of clinical and population variants.https://github.com/nglviewer/ngl

Read more

Predicted


Description: Structure prediction from Alphafold project. Structure version 2

# Chains: 1      # Clinical variants: 0      # Population variants: 523

Antigens:

Off
On

Variants:

Off
Clinical
Population

Color scheme:

Confidence
Residue index
Chain name

Autorotate:

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On



PROTEIN BROWSERi

The protein browser displays the antigen location on the target protein(s) and the features of the target protein. The tabs at the top of the protein view section can be used to switch between the different splice variants to which an antigen has been mapped.

At the top of the view, the position of the antigen (identified by the corresponding HPA identifier) is shown as a green bar. A yellow triangle on the bar indicates a <100% sequence identity to the protein target.

Below the antigens, the maximum percent sequence identity of the protein to all other proteins from other human genes is displayed, using a sliding window of 10 aa residues (HsID 10) or 50 aa residues (HsID 50). The region with the lowest possible identity is always selected for antigen design, with a maximum identity of 60% allowed for designing a single-target antigen (read more).

The curve in blue displays the predicted antigenicity i.e. the tendency for different regions of the protein to generate an immune response, with peak regions being predicted to be more antigenic.The curve shows average values based on a sliding window approach using an in-house propensity scale. (read more).

If a signal peptide is predicted by a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius (turquoise) and/or transmembrane regions (orange) are predicted by MDM, these are displayed.

Low complexity regions are shown in yellow and InterPro regions in green. Common (purple) and unique (grey) regions between different splice variants of the gene are also displayed (read more), and at the bottom of the protein view is the protein scale.
«
CD22-201
CD22-202
CD22-203
CD22-204
CD22-205
CD22-207
CD22-209
CD22-213
CD22-216
CD22-219
CD22-223
CD22-224
CD22-225
CD22-234
»


PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The ENSP identifier links to the Ensembl website protein summary, while the ENST identifier links to the Ensembl website transcript summary for the selected splice variant. The data in the UniProt column can be expanded to show links to all matching UniProt identifiers for this protein.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The Gene Ontology terms assigned to this protein are listed if expanding the Gene ontology column. The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide (according to a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius) and the number of predicted transmembrane region(s) (according to MDM) are also reported.
Splice variant UniProt Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
CD22-201
ENSP00000085219
ENST00000085219
P20273 [Direct mapping]
B-cell receptor CD22
Q0EAF5 [Target identity:100%; Query identity:100%]
CD22 antigen; CD22 molecule
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
847 aa
95.3 kDa
Yes 1
CD22-202
ENSP00000339349
ENST00000341773
P20273 [Direct mapping]
B-cell receptor CD22
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
670 aa
75.8 kDa
Yes 1
CD22-203
ENSP00000403822
ENST00000419549
P20273 [Direct mapping]
B-cell receptor CD22
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
675 aa
75.4 kDa
No 1
CD22-204
ENSP00000442279
ENST00000536635
P20273 [Direct mapping]
B-cell receptor CD22
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
759 aa
85.7 kDa
Yes 1
CD22-205
ENSP00000441237
ENST00000544992
P20273 [Direct mapping]
B-cell receptor CD22
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
751 aa
84.5 kDa
Yes 1
CD22-207
ENSP00000471972
ENST00000593867
M0R1M2 [Direct mapping]
B-cell receptor CD22
Show all
   MEMSAT3 predicted membrane proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
225 aa
26 kDa
Yes 0
CD22-209
ENSP00000469984
ENST00000594250
P20273 [Direct mapping]
B-cell receptor CD22
Show all
CD markers
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Plasma proteins
FDA approved drug targets
   Biotech drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0001791 [IgM binding]
GO:0002638 [negative regulation of immunoglobulin production]
GO:0005102 [signaling receptor binding]
GO:0005515 [protein binding]
GO:0005737 [cytoplasm]
GO:0005769 [early endosome]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0007155 [cell adhesion]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0019903 [protein phosphatase binding]
GO:0030100 [regulation of endocytosis]
GO:0030246 [carbohydrate binding]
GO:0030888 [regulation of B cell proliferation]
GO:0032809 [neuronal cell body membrane]
GO:0033691 [sialic acid binding]
GO:0042113 [B cell activation]
GO:0042609 [CD4 receptor binding]
GO:0050776 [regulation of immune response]
GO:0050849 [negative regulation of calcium-mediated signaling]
GO:0050859 [negative regulation of B cell receptor signaling pathway]
GO:0055037 [recycling endosome]
GO:0070062 [extracellular exosome]
Show all
670 aa
75.8 kDa
Yes 1
CD22-213
ENSP00000472664
ENST00000595780
M0R2M0 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
133 aa
15.5 kDa
Yes 0
CD22-216
ENSP00000472762
ENST00000597916
M0R2R8 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
137 aa
16 kDa
Yes 0
CD22-219
ENSP00000469980
ENST00000598537
M0QYP4 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
106 aa
12.3 kDa
Yes 0
CD22-223
ENSP00000469523
ENST00000599811
M0QY14 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
164 aa
18.9 kDa
Yes 0
CD22-224
ENSP00000469503
ENST00000600131
M0QY05 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
144 aa
16.8 kDa
Yes 0
CD22-225
ENSP00000471399
ENST00000600424
M0R0R6 [Direct mapping]
B-cell receptor CD22
Show all
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Show all
158 aa
18.2 kDa
Yes 0
CD22-234
ENSP00000482823
ENST00000613136
A0A087WZQ4 [Direct mapping]
B-cell receptor CD22
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
153 aa
16.7 kDa
No 0

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The Human Protein Atlas project is funded
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