Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2412
Number of amino acids:33
Molecular Weight:3143.74 Da
Theoretical pI:5.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)412.12%
Cysteine CYS (C)618.18%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)26.06%
Glycine GLY (G)721.21%
Phynylalanine PHE (F)13.03%
Isoleucine ILE (I)13.03%
Histidine HIS (H)00%
Lysine LYS (K)13.03%
Methionine MET (M)00%
Leucine LEU (L)39.09%
Asparagine ASN (N)13.03%
Glutamine GLN (Q)00%
Proline PRO (P)13.03%
Serine SER (S)00%
Arginine ARG (R)13.03%
Threonine THR (T)13.03%
Tryptophan TRP (W)00%
Valine VAL (V)412.12%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC130
HydrogenH216
NitrogenN38
OxygenO40
SulphurS6

FormulaC130H216N38O40S6
Total Number of Atoms:430


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):2
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    375
Absorption 0.1% (=1 g/l)    0.119,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.030

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.27, 27.27, 21.21]

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:94.5454
Grand average of hydropathicity (GRAVY):1.02