Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4873
Number of amino acids:79
Molecular Weight:8897.18 Da
Theoretical pI:5.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)45.06%
Cysteine CYS (C)33.8%
Glutamic Acid GLU (E)911.39%
Aspartic Acid ASP (D)22.53%
Glycine GLY (G)45.06%
Phynylalanine PHE (F)22.53%
Isoleucine ILE (I)67.59%
Histidine HIS (H)22.53%
Lysine LYS (K)45.06%
Methionine MET (M)22.53%
Leucine LEU (L)911.39%
Asparagine ASN (N)33.8%
Glutamine GLN (Q)11.27%
Proline PRO (P)22.53%
Serine SER (S)56.33%
Arginine ARG (R)45.06%
Threonine THR (T)1113.92%
Tryptophan TRP (W)00%
Valine VAL (V)33.8%
Tyrosine TYR (Y)33.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC388
HydrogenH629
NitrogenN103
OxygenO125
SulphurS5

FormulaC388H629N103O125S5
Total Number of Atoms:1250


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4595
Absorption 0.1% (=1 g/l)    0.516,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.502,   assuming all CYS residues are reduced
Aromaticity:0.063

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.21

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.11, 17.72, 30.38]

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:90.1266
Grand average of hydropathicity (GRAVY):-0.19