Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5573
Number of amino acids:123
Molecular Weight:12473.68 Da
Theoretical pI:8.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1512.2%
Cysteine CYS (C)118.94%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)21.63%
Glycine GLY (G)129.76%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)64.88%
Histidine HIS (H)00%
Lysine LYS (K)75.69%
Methionine MET (M)43.25%
Leucine LEU (L)118.94%
Asparagine ASN (N)108.13%
Glutamine GLN (Q)54.07%
Proline PRO (P)75.69%
Serine SER (S)108.13%
Arginine ARG (R)21.63%
Threonine THR (T)64.88%
Tryptophan TRP (W)00%
Valine VAL (V)118.94%
Tyrosine TYR (Y)43.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC531
HydrogenH885
NitrogenN151
OxygenO163
SulphurS15

FormulaC531H885N151O163S15
Total Number of Atoms:1745


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):2
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    6585
Absorption 0.1% (=1 g/l)    0.528,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.478,   assuming all CYS residues are reduced
Aromaticity:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.02, 31.71, 24.39]

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:92.0325
Grand average of hydropathicity (GRAVY):0.39