Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5245
Number of amino acids:349
Molecular Weight:38179.5 Da
Theoretical pI:7.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)277.74%
Cysteine CYS (C)102.87%
Glutamic Acid GLU (E)72.01%
Aspartic Acid ASP (D)236.59%
Glycine GLY (G)257.16%
Phynylalanine PHE (F)236.59%
Isoleucine ILE (I)174.87%
Histidine HIS (H)30.86%
Lysine LYS (K)51.43%
Methionine MET (M)61.72%
Leucine LEU (L)3810.89%
Asparagine ASN (N)236.59%
Glutamine GLN (Q)133.72%
Proline PRO (P)216.02%
Serine SER (S)288.02%
Arginine ARG (R)267.45%
Threonine THR (T)236.59%
Tryptophan TRP (W)20.57%
Valine VAL (V)236.59%
Tyrosine TYR (Y)61.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1688
HydrogenH2656
NitrogenN476
OxygenO503
SulphurS16

FormulaC1688H2656N476O503S16
Total Number of Atoms:5339


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20565
Absorption 0.1% (=1 g/l)    0.539,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.522,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.23, 27.79, 22.35]

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:88.3096
Grand average of hydropathicity (GRAVY):-0.01