Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4111
Number of amino acids:372
Molecular Weight:39556.28 Da
Theoretical pI:4.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)215.65%
Cysteine CYS (C)123.23%
Glutamic Acid GLU (E)205.38%
Aspartic Acid ASP (D)215.65%
Glycine GLY (G)328.6%
Phynylalanine PHE (F)112.96%
Isoleucine ILE (I)277.26%
Histidine HIS (H)61.61%
Lysine LYS (K)164.3%
Methionine MET (M)71.88%
Leucine LEU (L)5314.25%
Asparagine ASN (N)195.11%
Glutamine GLN (Q)41.08%
Proline PRO (P)205.38%
Serine SER (S)4812.9%
Arginine ARG (R)123.23%
Threonine THR (T)205.38%
Tryptophan TRP (W)41.08%
Valine VAL (V)164.3%
Tyrosine TYR (Y)30.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1736
HydrogenH2805
NitrogenN463
OxygenO549
SulphurS19

FormulaC1736H2805N463O549S19
Total Number of Atoms:5572


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27220
Absorption 0.1% (=1 g/l)    0.688,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26470
Absorption 0.1% (=1 g/l)    0.669,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.65, 31.99, 27.15]

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:101.989
Grand average of hydropathicity (GRAVY):0.10