Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6015
Number of amino acids:98
Molecular Weight:10744.66 Da
Theoretical pI:9.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.18%
Cysteine CYS (C)1212.24%
Glutamic Acid GLU (E)11.02%
Aspartic Acid ASP (D)33.06%
Glycine GLY (G)77.14%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)44.08%
Histidine HIS (H)22.04%
Lysine LYS (K)77.14%
Methionine MET (M)11.02%
Leucine LEU (L)1010.2%
Asparagine ASN (N)44.08%
Glutamine GLN (Q)44.08%
Proline PRO (P)44.08%
Serine SER (S)77.14%
Arginine ARG (R)99.18%
Threonine THR (T)44.08%
Tryptophan TRP (W)00%
Valine VAL (V)55.1%
Tyrosine TYR (Y)55.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC454
HydrogenH756
NitrogenN144
OxygenO131
SulphurS13

FormulaC454H756N144O131S13
Total Number of Atoms:1498


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):4
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    8200
Absorption 0.1% (=1 g/l)    0.763,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.693,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.38

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.49, 22.45, 21.43]

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:79.6939
Grand average of hydropathicity (GRAVY):-0.15