Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5228
Number of amino acids:222
Molecular Weight:24051.06 Da
Theoretical pI:9.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.21%
Cysteine CYS (C)41.8%
Glutamic Acid GLU (E)41.8%
Aspartic Acid ASP (D)94.05%
Glycine GLY (G)219.46%
Phynylalanine PHE (F)177.66%
Isoleucine ILE (I)135.86%
Histidine HIS (H)41.8%
Lysine LYS (K)177.66%
Methionine MET (M)31.35%
Leucine LEU (L)209.01%
Asparagine ASN (N)146.31%
Glutamine GLN (Q)41.8%
Proline PRO (P)156.76%
Serine SER (S)114.95%
Arginine ARG (R)41.8%
Threonine THR (T)135.86%
Tryptophan TRP (W)00%
Valine VAL (V)2310.36%
Tyrosine TYR (Y)104.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1115
HydrogenH1725
NitrogenN277
OxygenO301
SulphurS7

FormulaC1115H1725N277O301S7
Total Number of Atoms:3425


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15150
Absorption 0.1% (=1 g/l)    0.630,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.620,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 15.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.39, 27.48, 19.37]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:95.2254
Grand average of hydropathicity (GRAVY):0.24