Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3487
Number of amino acids:99
Molecular Weight:10951.14 Da
Theoretical pI:5.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.08%
Cysteine CYS (C)33.03%
Glutamic Acid GLU (E)1212.12%
Aspartic Acid ASP (D)88.08%
Glycine GLY (G)1111.11%
Phynylalanine PHE (F)44.04%
Isoleucine ILE (I)77.07%
Histidine HIS (H)77.07%
Lysine LYS (K)77.07%
Methionine MET (M)22.02%
Leucine LEU (L)33.03%
Asparagine ASN (N)33.03%
Glutamine GLN (Q)00%
Proline PRO (P)55.05%
Serine SER (S)22.02%
Arginine ARG (R)44.04%
Threonine THR (T)55.05%
Tryptophan TRP (W)00%
Valine VAL (V)55.05%
Tyrosine TYR (Y)33.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC476
HydrogenH729
NitrogenN135
OxygenO153
SulphurS5

FormulaC476H729N135O153S5
Total Number of Atoms:1498


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):20
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)    0.420,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.408,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.38

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 21.21, 25.25]

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:62.1212
Grand average of hydropathicity (GRAVY):-0.69