Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4427
Number of amino acids:505
Molecular Weight:54206.45 Da
Theoretical pI:5.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)509.9%
Cysteine CYS (C)61.19%
Glutamic Acid GLU (E)142.77%
Aspartic Acid ASP (D)244.75%
Glycine GLY (G)305.94%
Phynylalanine PHE (F)132.57%
Isoleucine ILE (I)326.34%
Histidine HIS (H)91.78%
Lysine LYS (K)163.17%
Methionine MET (M)91.78%
Leucine LEU (L)5410.69%
Asparagine ASN (N)458.91%
Glutamine GLN (Q)112.18%
Proline PRO (P)316.14%
Serine SER (S)469.11%
Arginine ARG (R)132.57%
Threonine THR (T)397.72%
Tryptophan TRP (W)50.99%
Valine VAL (V)367.13%
Tyrosine TYR (Y)224.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2417
HydrogenH3795
NitrogenN639
OxygenO745
SulphurS15

FormulaC2417H3795N639O745S15
Total Number of Atoms:7611


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60655
Absorption 0.1% (=1 g/l)    1.119,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60280
Absorption 0.1% (=1 g/l)    1.112,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.08, 30.10, 25.15]

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:96.9902
Grand average of hydropathicity (GRAVY):0.04