Physicochemical Properties of Peptide



PPepDB ID:PPepDB_615
Number of amino acids:226
Molecular Weight:24065.04 Da
Theoretical pI:5.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)135.75%
Cysteine CYS (C)177.52%
Glutamic Acid GLU (E)73.1%
Aspartic Acid ASP (D)114.87%
Glycine GLY (G)2711.95%
Phynylalanine PHE (F)156.64%
Isoleucine ILE (I)83.54%
Histidine HIS (H)10.44%
Lysine LYS (K)114.87%
Methionine MET (M)10.44%
Leucine LEU (L)125.31%
Asparagine ASN (N)114.87%
Glutamine GLN (Q)93.98%
Proline PRO (P)135.75%
Serine SER (S)219.29%
Arginine ARG (R)62.65%
Threonine THR (T)198.41%
Tryptophan TRP (W)31.33%
Valine VAL (V)135.75%
Tyrosine TYR (Y)83.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1054
HydrogenH1598
NitrogenN280
OxygenO331
SulphurS18

FormulaC1054H1598N280O331S18
Total Number of Atoms:3281


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.223,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.181,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.11, 31.86, 14.60]

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:56.9469
Grand average of hydropathicity (GRAVY):-0.15