Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4900
Number of amino acids:347
Molecular Weight:38035.38 Da
Theoretical pI:8.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.2%
Cysteine CYS (C)82.31%
Glutamic Acid GLU (E)61.73%
Aspartic Acid ASP (D)308.65%
Glycine GLY (G)216.05%
Phynylalanine PHE (F)205.76%
Isoleucine ILE (I)164.61%
Histidine HIS (H)51.44%
Lysine LYS (K)226.34%
Methionine MET (M)72.02%
Leucine LEU (L)3810.95%
Asparagine ASN (N)205.76%
Glutamine GLN (Q)113.17%
Proline PRO (P)174.9%
Serine SER (S)3610.37%
Arginine ARG (R)195.48%
Threonine THR (T)185.19%
Tryptophan TRP (W)10.29%
Valine VAL (V)216.05%
Tyrosine TYR (Y)61.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1676
HydrogenH2672
NitrogenN468
OxygenO511
SulphurS15

FormulaC1676H2672N468O511S15
Total Number of Atoms:5342


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.393,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.380,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.39, 27.09, 21.90]

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:85.4466
Grand average of hydropathicity (GRAVY):-0.20