Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5724
Number of amino acids:148
Molecular Weight:15743.03 Da
Theoretical pI:5.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2214.86%
Cysteine CYS (C)10.68%
Glutamic Acid GLU (E)96.08%
Aspartic Acid ASP (D)85.41%
Glycine GLY (G)1510.14%
Phynylalanine PHE (F)42.7%
Isoleucine ILE (I)21.35%
Histidine HIS (H)10.68%
Lysine LYS (K)42.7%
Methionine MET (M)21.35%
Leucine LEU (L)1510.14%
Asparagine ASN (N)21.35%
Glutamine GLN (Q)53.38%
Proline PRO (P)64.05%
Serine SER (S)85.41%
Arginine ARG (R)128.11%
Threonine THR (T)32.03%
Tryptophan TRP (W)21.35%
Valine VAL (V)2214.86%
Tyrosine TYR (Y)53.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC702
HydrogenH1123
NitrogenN199
OxygenO206
SulphurS3

FormulaC702H1123N199O206S3
Total Number of Atoms:2233


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    1.172,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    1.172,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.78, 20.95, 32.43]

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:102.77
Grand average of hydropathicity (GRAVY):0.18