Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5387
Number of amino acids:375
Molecular Weight:40258.09 Da
Theoretical pI:6.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)287.47%
Cysteine CYS (C)112.93%
Glutamic Acid GLU (E)92.4%
Aspartic Acid ASP (D)236.13%
Glycine GLY (G)359.33%
Phynylalanine PHE (F)143.73%
Isoleucine ILE (I)215.6%
Histidine HIS (H)112.93%
Lysine LYS (K)143.73%
Methionine MET (M)92.4%
Leucine LEU (L)246.4%
Asparagine ASN (N)359.33%
Glutamine GLN (Q)61.6%
Proline PRO (P)154%
Serine SER (S)3910.4%
Arginine ARG (R)143.73%
Threonine THR (T)225.87%
Tryptophan TRP (W)71.87%
Valine VAL (V)297.73%
Tyrosine TYR (Y)92.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1752
HydrogenH2719
NitrogenN501
OxygenO551
SulphurS20

FormulaC1752H2719N501O551S20
Total Number of Atoms:5543


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    52535
Absorption 0.1% (=1 g/l)    1.305,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51910
Absorption 0.1% (=1 g/l)    1.289,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.73, 33.07, 18.67]

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:76.6933
Grand average of hydropathicity (GRAVY):-0.18