Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2641
Number of amino acids:49
Molecular Weight:5672.42 Da
Theoretical pI:8.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.04%
Cysteine CYS (C)12.04%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)36.12%
Glycine GLY (G)24.08%
Phynylalanine PHE (F)12.04%
Isoleucine ILE (I)612.24%
Histidine HIS (H)714.29%
Lysine LYS (K)12.04%
Methionine MET (M)24.08%
Leucine LEU (L)36.12%
Asparagine ASN (N)00%
Glutamine GLN (Q)48.16%
Proline PRO (P)36.12%
Serine SER (S)918.37%
Arginine ARG (R)36.12%
Threonine THR (T)00%
Tryptophan TRP (W)12.04%
Valine VAL (V)12.04%
Tyrosine TYR (Y)12.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC248
HydrogenH382
NitrogenN78
OxygenO70
SulphurS3

FormulaC248H382N78O70S3
Total Number of Atoms:781


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.232,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.232,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 28.57, 12.24]

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:79.5919
Grand average of hydropathicity (GRAVY):-0.53