Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3936
Number of amino acids:53
Molecular Weight:6135.3 Da
Theoretical pI:9.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.89%
Cysteine CYS (C)815.09%
Glutamic Acid GLU (E)23.77%
Aspartic Acid ASP (D)23.77%
Glycine GLY (G)47.55%
Phynylalanine PHE (F)35.66%
Isoleucine ILE (I)23.77%
Histidine HIS (H)00%
Lysine LYS (K)611.32%
Methionine MET (M)23.77%
Leucine LEU (L)35.66%
Asparagine ASN (N)23.77%
Glutamine GLN (Q)35.66%
Proline PRO (P)23.77%
Serine SER (S)35.66%
Arginine ARG (R)47.55%
Threonine THR (T)23.77%
Tryptophan TRP (W)23.77%
Valine VAL (V)23.77%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC262
HydrogenH420
NitrogenN78
OxygenO72
SulphurS10

FormulaC262H420N78O72S10
Total Number of Atoms:842


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11500
Absorption 0.1% (=1 g/l)    1.874,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    1.793,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.64, 20.75, 15.09]

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:49.6226
Grand average of hydropathicity (GRAVY):-0.39