Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2071
Number of amino acids:35
Molecular Weight:3608.22 Da
Theoretical pI:7.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.86%
Cysteine CYS (C)617.14%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)25.71%
Glycine GLY (G)617.14%
Phynylalanine PHE (F)12.86%
Isoleucine ILE (I)12.86%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)38.57%
Asparagine ASN (N)25.71%
Glutamine GLN (Q)25.71%
Proline PRO (P)38.57%
Serine SER (S)12.86%
Arginine ARG (R)38.57%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)411.43%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC148
HydrogenH244
NitrogenN48
OxygenO45
SulphurS6

FormulaC148H244N48O45S6
Total Number of Atoms:491


Total number of positively charged residues (ARG + LYS):3
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)    0.104,   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:0.029

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.71, 34.29, 11.43]

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:80.5715
Grand average of hydropathicity (GRAVY):0.28