Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4065
Number of amino acids:356
Molecular Weight:39707.5 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.74%
Cysteine CYS (C)82.25%
Glutamic Acid GLU (E)339.27%
Aspartic Acid ASP (D)226.18%
Glycine GLY (G)318.71%
Phynylalanine PHE (F)164.49%
Isoleucine ILE (I)164.49%
Histidine HIS (H)71.97%
Lysine LYS (K)308.43%
Methionine MET (M)61.69%
Leucine LEU (L)287.87%
Asparagine ASN (N)174.78%
Glutamine GLN (Q)61.69%
Proline PRO (P)92.53%
Serine SER (S)328.99%
Arginine ARG (R)123.37%
Threonine THR (T)164.49%
Tryptophan TRP (W)61.69%
Valine VAL (V)215.9%
Tyrosine TYR (Y)164.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1761
HydrogenH2709
NitrogenN465
OxygenO554
SulphurS14

FormulaC1761H2709N465O554S14
Total Number of Atoms:5503


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    57340
Absorption 0.1% (=1 g/l)    1.444,   assuming all pairs of CYS residues form cystines

Ext. coefficient    56840
Absorption 0.1% (=1 g/l)    1.431,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.93, 25.00, 25.56]

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:72.0506
Grand average of hydropathicity (GRAVY):-0.48