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C2
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  • C2
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.

C2
Synonyms
Gene descriptioni

Full gene name according to HGNC.

Complement C2
Protein classi

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

Read more
Disease related genes
Enzymes
Human disease related genes
Plasma proteins
Potential drug targets
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,Secreted
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 6
Cytoband p21.33
Chromosome location (bp) 31897785 - 31945672
Number of transcriptsi

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

11
Ensembl ENSG00000166278 (version 103.38)
Entrez gene 717
HGNC HGNC:1248
UniProt P06681 (UniProt - Evidence at protein level)
neXtProt NX_P06681
Antibodypedia C2 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: 411

Antigens:

Off
On

Variants:

Off
Clinical
Population

Color scheme:

Confidence
Residue index
Chain name

Autorotate:

Off
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.
«
C2-201
C2-202
C2-204
C2-205
C2-206
C2-207
C2-208
C2-209
C2-211
C2-216
C2-217
»


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)
C2-201
ENSP00000299367
ENST00000299367
P06681 [Direct mapping]
Complement C2 Complement C2b fragment Complement C2a fragment
Q5JP69 [Target identity:100%; Query identity:100%]
C3/C5 convertase
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   MEMSAT3 predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Plasma proteins
Disease related genes
Potential drug targets
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002376 [immune system process]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0007584 [response to nutrient]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
GO:0030449 [regulation of complement activation]
GO:0045087 [innate immune response]
GO:0046872 [metal ion binding]
GO:0070062 [extracellular exosome]
GO:2000427 [positive regulation of apoptotic cell clearance]
Show all
752 aa
83.3 kDa
Yes 0
C2-202
ENSP00000372664
ENST00000383177
H0Y3H6 [Direct mapping]
C3/C5 convertase
Show all
   SPOCTOPUS predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002376 [immune system process]
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
GO:0045087 [innate immune response]
Show all
526 aa
58.8 kDa
Yes 0
C2-204
ENSP00000403325
ENST00000413154
Q5ST52 [Direct mapping]
C3/C5 convertase
Show all
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0016787 [hydrolase activity]
Show all
139 aa
14.8 kDa
Yes 0
C2-205
ENSP00000406190
ENST00000418949
Q8N6L6 [Direct mapping]
C3/C5 convertase
Show all
   MEMSAT3 predicted membrane proteins
   SCAMPI predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0016787 [hydrolase activity]
Show all
328 aa
35.5 kDa
Yes 0
C2-206
ENSP00000395683
ENST00000442278
P06681 [Direct mapping]
Complement C2 Complement C2b fragment Complement C2a fragment
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Plasma proteins
Disease related genes
Potential drug targets
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002376 [immune system process]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
GO:0030449 [regulation of complement activation]
GO:0045087 [innate immune response]
GO:0046872 [metal ion binding]
GO:0070062 [extracellular exosome]
GO:2000427 [positive regulation of apoptotic cell clearance]
Show all
620 aa
69.4 kDa
Yes 0
C2-207
ENSP00000391354
ENST00000447952
F2Z3N2 [Direct mapping]
C3/C5 convertase
Show all
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0016787 [hydrolase activity]
Show all
203 aa
21.7 kDa
Yes 0
C2-208
ENSP00000406121
ENST00000452202
A2ABG0 [Direct mapping]
C3/C5 convertase
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0016787 [hydrolase activity]
Show all
158 aa
17.5 kDa
No 0
C2-209
ENSP00000392322
ENST00000452323
P06681 [Direct mapping]
Complement C2 Complement C2b fragment Complement C2a fragment
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Plasma proteins
Disease related genes
Potential drug targets
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002376 [immune system process]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
GO:0030449 [regulation of complement activation]
GO:0045087 [innate immune response]
GO:0046872 [metal ion binding]
GO:0070062 [extracellular exosome]
GO:2000427 [positive regulation of apoptotic cell clearance]
Show all
538 aa
60.3 kDa
No 0
C2-211
ENSP00000418923
ENST00000469372
B4DQI1 [Direct mapping]
Complement C2; cDNA FLJ54376, highly similar to Complement C2
Show all
   SPOCTOPUS predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
Show all
506 aa
56.5 kDa
No 0
C2-216
ENSP00000419048
ENST00000494905
C9JYQ5 [Direct mapping]
C3/C5 convertase
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0016787 [hydrolase activity]
Show all
136 aa
14.9 kDa
No 0
C2-217
ENSP00000417482
ENST00000497706
E9PDZ0 [Direct mapping]
Complement C2
Show all
   SPOCTOPUS predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Human disease related genes
   Immune system diseases
   Allergies and autoimmune diseases
   Primary immunodeficiency
   Nervous system diseases
   Eye disease
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0005576 [extracellular region]
GO:0006508 [proteolysis]
GO:0006956 [complement activation]
GO:0006958 [complement activation, classical pathway]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
Show all
463 aa
51.4 kDa
No 0

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The Human Protein Atlas project is funded
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