Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4763
Number of amino acids:116
Molecular Weight:11687.77 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1916.38%
Cysteine CYS (C)108.62%
Glutamic Acid GLU (E)10.86%
Aspartic Acid ASP (D)21.72%
Glycine GLY (G)97.76%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)86.9%
Histidine HIS (H)00%
Lysine LYS (K)43.45%
Methionine MET (M)43.45%
Leucine LEU (L)86.9%
Asparagine ASN (N)86.9%
Glutamine GLN (Q)32.59%
Proline PRO (P)76.03%
Serine SER (S)97.76%
Arginine ARG (R)54.31%
Threonine THR (T)76.03%
Tryptophan TRP (W)00%
Valine VAL (V)108.62%
Tyrosine TYR (Y)21.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC493
HydrogenH834
NitrogenN146
OxygenO152
SulphurS14

FormulaC493H834N146O152S14
Total Number of Atoms:1639


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):3
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    3605
Absorption 0.1% (=1 g/l)    0.308,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.255,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.14, 28.45, 27.59]

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:95.1724
Grand average of hydropathicity (GRAVY):0.51